40912931 has 4 divisors (see below), whose sum is σ = 43319592. Its totient is φ = 38506272.

The previous prime is 40912903. The next prime is 40912933. The reversal of 40912931 is 13921904.

It is a happy number.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-40912931 is a prime.

It is a super-2 number, since 2×40912931² = 3347735846021522, 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 = 40912894 and 40912903.

It is not an unprimeable number, because it can be changed into a prime (40912933) 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, 1203305 + ... + 1203338.

It is an arithmetic number, because the mean of its divisors is an integer number (10829898).

Almost surely, 2^40912931 is an apocalyptic number.

40912931 is a deficient number, since it is larger than the sum of its proper divisors (2406661).

40912931 is a wasteful number, since it uses less digits than its factorization.

40912931 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2406660.

The product of its (nonzero) digits is 1944, while the sum is 29.

The square root of 40912931 is about 6396.3216773393. The cubic root of 40912931 is about 344.5774593178.

The spelling of 40912931 in words is "forty million, nine hundred twelve thousand, nine hundred thirty-one".