196923825121 has 3 divisors (see below), whose sum is σ = 196924268883. Its totient is φ = 196923381360.

The previous prime is 196923825061. The next prime is 196923825149. The reversal of 196923825121 is 121528329691.

The square root of 196923825121 is 443761.

It is a perfect power (a square), and thus also a powerful number.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length, and also an emirpimes, since its reverse is a distinct semiprime: 121528329691 = 271 ⋅448444021.

It can be written as a sum of positive squares in only one way, i.e., 97774410721 + 99149414400 = 312689^2 + 314880^2 .

It is not a de Polignac number, because 196923825121 - 2¹⁷ = 196923694049 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (196923825221) by changing a digit.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 221881 + ... + 665641.

It is an arithmetic number, because the mean of its divisors is an integer number (65641422961).

Almost surely, 2^196923825121 is an apocalyptic number.

196923825121 is the 443761-st square number.

196923825121 is the 221881-st centered octagonal number.

It is an amenable number.

196923825121 is a deficient number, since it is larger than the sum of its proper divisors (443762).

196923825121 is an frugal number, since it uses more digits than its factorization.

196923825121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 887522 (or 443761 counting only the distinct ones).

The product of its digits is 466560, while the sum is 49.

Multiplying 196923825121 by its sum of digits (49), we get a square (9649267430929 = 3106327²).

The spelling of 196923825121 in words is "one hundred ninety-six billion, nine hundred twenty-three million, eight hundred twenty-five thousand, one hundred twenty-one".