40959631 has 2 divisors, whose sum is σ = 40959632. Its totient is φ = 40959630.

The previous prime is 40959599. The next prime is 40959671. The reversal of 40959631 is 13695904.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 40959631 - 2⁵ = 40959599 is a prime.

It is a super-2 number, since 2×40959631² = 3355382743312322, which contains 22 as substring.

It is equal to p_2488447 and since 40959631 and 2488447 have the same sum of digits, it is a Honaker prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (40959671) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20479815 + 20479816.

It is an arithmetic number, because the mean of its divisors is an integer number (20479816).

Almost surely, 2^40959631 is an apocalyptic number.

40959631 is a deficient number, since it is larger than the sum of its proper divisors (1).

40959631 is an equidigital number, since it uses as much as digits as its factorization.

40959631 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 29160, while the sum is 37.

The square root of 40959631 is about 6399.9711718101. The cubic root of 40959631 is about 344.7085152635.

The spelling of 40959631 in words is "forty million, nine hundred fifty-nine thousand, six hundred thirty-one".