402624169 has 2 divisors, whose sum is σ = 402624170. Its totient is φ = 402624168.

The previous prime is 402624149. The next prime is 402624247. The reversal of 402624169 is 961426204.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 316412944 + 86211225 = 17788^2 + 9285^2 .

It is a cyclic number.

It is not a de Polignac number, because 402624169 - 2⁹ = 402623657 is a prime.

It is a super-2 number, since 2×402624169² = 324212442925881122, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (402624149) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 201312084 + 201312085.

It is an arithmetic number, because the mean of its divisors is an integer number (201312085).

Almost surely, 2^402624169 is an apocalyptic number.

It is an amenable number.

402624169 is a deficient number, since it is larger than the sum of its proper divisors (1).

402624169 is an equidigital number, since it uses as much as digits as its factorization.

402624169 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 20736, while the sum is 34.

The square root of 402624169 is about 20065.4969786447. The cubic root of 402624169 is about 738.4140425552.

The spelling of 402624169 in words is "four hundred two million, six hundred twenty-four thousand, one hundred sixty-nine".