31914137 has 4 divisors (see below), whose sum is σ = 31925520. Its totient is φ = 31902756.

The previous prime is 31914119. The next prime is 31914139. The reversal of 31914137 is 73141913.

It is a happy number.

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, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 31914137 - 2⁶ = 31914073 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (31914139) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1814 + ... + 8192.

It is an arithmetic number, because the mean of its divisors is an integer number (7981380).

Almost surely, 2^31914137 is an apocalyptic number.

It is an amenable number.

31914137 is a deficient number, since it is larger than the sum of its proper divisors (11383).

31914137 is an equidigital number, since it uses as much as digits as its factorization.

31914137 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11382.

The product of its digits is 2268, while the sum is 29.

The square root of 31914137 is about 5649.2598630263. The cubic root of 31914137 is about 317.1959997577.

The spelling of 31914137 in words is "thirty-one million, nine hundred fourteen thousand, one hundred thirty-seven".