196912881 has 12 divisors (see below), whose sum is σ = 310287120. Its totient is φ = 119341080.

The previous prime is 196912879. The next prime is 196912883. The reversal of 196912881 is 188219691.

It is an interprime number because it is at equal distance from previous prime (196912879) and next prime (196912883).

It is not a de Polignac number, because 196912881 - 2¹ = 196912879 is a prime.

It is a super-2 number, since 2×196912881² = 77549365407440322, which contains 22 as substring.

It is a Smith number, since the sum of its digits (45) coincides with the sum of the digits of its prime factors.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (196912883) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 994411 + ... + 994608.

It is an arithmetic number, because the mean of its divisors is an integer number (25857260).

Almost surely, 2^196912881 is an apocalyptic number.

196912881 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

196912881 is a deficient number, since it is larger than the sum of its proper divisors (113374239).

196912881 is a wasteful number, since it uses less digits than its factorization.

196912881 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1989036 (or 1989033 counting only the distinct ones).

The product of its digits is 62208, while the sum is 45.

The square root of 196912881 is about 14032.5650185559. The cubic root of 196912881 is about 581.7790017199.

The spelling of 196912881 in words is "one hundred ninety-six million, nine hundred twelve thousand, eight hundred eighty-one".