231972937 has 4 divisors (see below), whose sum is σ = 265111936. Its totient is φ = 198833940.

The previous prime is 231972931. The next prime is 231972959. The reversal of 231972937 is 739279132.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 231972937 - 2³ = 231972929 is a prime.

It is a super-2 number, since 2×231972937² = 107622887000811938, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 231972893 and 231972902.

It is not an unprimeable number, because it can be changed into a prime (231972931) 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, 16569489 + ... + 16569502.

It is an arithmetic number, because the mean of its divisors is an integer number (66277984).

Almost surely, 2^231972937 is an apocalyptic number.

It is an amenable number.

231972937 is a deficient number, since it is larger than the sum of its proper divisors (33138999).

231972937 is an equidigital number, since it uses as much as digits as its factorization.

231972937 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 33138998.

The product of its digits is 142884, while the sum is 43.

The square root of 231972937 is about 15230.6577993204. The cubic root of 231972937 is about 614.4394716477.

The spelling of 231972937 in words is "two hundred thirty-one million, nine hundred seventy-two thousand, nine hundred thirty-seven".