196923649 has 4 divisors (see below), whose sum is σ = 212071636. Its totient is φ = 181775664.

The previous prime is 196923647. The next prime is 196923667. The reversal of 196923649 is 946329691.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 126900225 + 70023424 = 11265^2 + 8368^2 .

It is a cyclic number.

It is not a de Polignac number, because 196923649 - 2¹ = 196923647 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (196923647) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7573974 + ... + 7573999.

It is an arithmetic number, because the mean of its divisors is an integer number (53017909).

Almost surely, 2^196923649 is an apocalyptic number.

It is an amenable number.

196923649 is a deficient number, since it is larger than the sum of its proper divisors (15147987).

196923649 is a wasteful number, since it uses less digits than its factorization.

196923649 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15147986.

The product of its digits is 629856, while the sum is 49.

The square root of 196923649 is about 14032.9486922742. The cubic root of 196923649 is about 581.7896062100.

The spelling of 196923649 in words is "one hundred ninety-six million, nine hundred twenty-three thousand, six hundred forty-nine".