40165913 has 8 divisors (see below), whose sum is σ = 41289600. Its totient is φ = 39050928.

The previous prime is 40165903. The next prime is 40165919. The reversal of 40165913 is 31956104.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 40165913 - 2¹⁰ = 40164889 is a prime.

It is a super-2 number, since 2×40165913² = 3226601134247138, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (40165919) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 7808 + ... + 11886.

It is an arithmetic number, because the mean of its divisors is an integer number (5161200).

Almost surely, 2^40165913 is an apocalyptic number.

40165913 is a gapful number since it is divisible by the number (43) formed by its first and last digit.

It is an amenable number.

40165913 is a deficient number, since it is larger than the sum of its proper divisors (1123687).

40165913 is a wasteful number, since it uses less digits than its factorization.

40165913 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4351.

The product of its (nonzero) digits is 3240, while the sum is 29.

The square root of 40165913 is about 6337.6583214938. The cubic root of 40165913 is about 342.4673824764.

The spelling of 40165913 in words is "forty million, one hundred sixty-five thousand, nine hundred thirteen".