40165049 has 2 divisors, whose sum is σ = 40165050. Its totient is φ = 40165048.

The previous prime is 40165039. The next prime is 40165051. The reversal of 40165049 is 94056104.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 21949225 + 18215824 = 4685^2 + 4268^2 .

It is a cyclic number.

It is not a de Polignac number, because 40165049 - 2⁸ = 40164793 is a prime.

It is a super-2 number, since 2×40165049² = 3226462322344802, which contains 22 as substring.

Together with 40165051, it forms a pair of twin primes.

It is a Chen prime.

It is equal to p_2443097 and since 40165049 and 2443097 have the same sum of digits, it is a Honaker prime.

It is not a weakly prime, because it can be changed into another prime (40165039) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20082524 + 20082525.

It is an arithmetic number, because the mean of its divisors is an integer number (20082525).

Almost surely, 2^40165049 is an apocalyptic number.

It is an amenable number.

40165049 is a deficient number, since it is larger than the sum of its proper divisors (1).

40165049 is an equidigital number, since it uses as much as digits as its factorization.

40165049 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 4320, while the sum is 29.

The square root of 40165049 is about 6337.5901571496. The cubic root of 40165049 is about 342.4649268790.

The spelling of 40165049 in words is "forty million, one hundred sixty-five thousand, forty-nine".