40694131 has 2 divisors, whose sum is σ = 40694132. Its totient is φ = 40694130.

The previous prime is 40694123. The next prime is 40694161. The reversal of 40694131 is 13149604.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 40694131 - 2³ = 40694123 is a prime.

It is a super-2 number, since 2×40694131² = 3312024595690322, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 40694131.

It is not a weakly prime, because it can be changed into another prime (40694111) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20347065 + 20347066.

It is an arithmetic number, because the mean of its divisors is an integer number (20347066).

Almost surely, 2^40694131 is an apocalyptic number.

40694131 is a deficient number, since it is larger than the sum of its proper divisors (1).

40694131 is an equidigital number, since it uses as much as digits as its factorization.

40694131 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2592, while the sum is 28.

The square root of 40694131 is about 6379.1951686714. The cubic root of 40694131 is about 343.9621009041.

The spelling of 40694131 in words is "forty million, six hundred ninety-four thousand, one hundred thirty-one".