197879931 has 12 divisors (see below), whose sum is σ = 285962040. Its totient is φ = 131857440.

The previous prime is 197879893. The next prime is 197879933. The reversal of 197879931 is 139978791.

It is not a de Polignac number, because 197879931 - 2⁶ = 197879867 is a prime.

It is a super-2 number, since 2×197879931² = 78312934185129522, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (197879933) 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, 22711 + ... + 30191.

It is an arithmetic number, because the mean of its divisors is an integer number (23830170).

Almost surely, 2^197879931 is an apocalyptic number.

197879931 is a deficient number, since it is larger than the sum of its proper divisors (88082109).

197879931 is a wasteful number, since it uses less digits than its factorization.

197879931 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10426 (or 10423 counting only the distinct ones).

The product of its digits is 857304, while the sum is 54.

The square root of 197879931 is about 14066.9801663328. The cubic root of 197879931 is about 582.7298297943.

The spelling of 197879931 in words is "one hundred ninety-seven million, eight hundred seventy-nine thousand, nine hundred thirty-one".