40797631 has 4 divisors (see below), whose sum is σ = 46625872. Its totient is φ = 34969392.

The previous prime is 40797629. The next prime is 40797649. The reversal of 40797631 is 13679704.

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

It is a cyclic number.

It is not a de Polignac number, because 40797631 - 2¹ = 40797629 is a prime.

It is a super-2 number, since 2×40797631² = 3328893390424322, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40797431) 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, 2914110 + ... + 2914123.

It is an arithmetic number, because the mean of its divisors is an integer number (11656468).

Almost surely, 2^40797631 is an apocalyptic number.

40797631 is a deficient number, since it is larger than the sum of its proper divisors (5828241).

40797631 is an equidigital number, since it uses as much as digits as its factorization.

40797631 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5828240.

The product of its (nonzero) digits is 31752, while the sum is 37.

The square root of 40797631 is about 6387.3023257084. The cubic root of 40797631 is about 344.2534610079.

The spelling of 40797631 in words is "forty million, seven hundred ninety-seven thousand, six hundred thirty-one".