402408269 has 2 divisors, whose sum is σ = 402408270. Its totient is φ = 402408268.

The previous prime is 402408257. The next prime is 402408301. The reversal of 402408269 is 962804204.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 402002500 + 405769 = 20050^2 + 637^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-402408269 is a prime.

It is a super-2 number, since 2×402408269² = 323864829919152722, which contains 22 as substring.

It is a Sophie Germain prime.

It is a Chen prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (402408169) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 201204134 + 201204135.

It is an arithmetic number, because the mean of its divisors is an integer number (201204135).

Almost surely, 2^402408269 is an apocalyptic number.

It is an amenable number.

402408269 is a deficient number, since it is larger than the sum of its proper divisors (1).

402408269 is an equidigital number, since it uses as much as digits as its factorization.

402408269 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 27648, while the sum is 35.

The square root of 402408269 is about 20060.1163755348. The cubic root of 402408269 is about 738.2820318542.

The spelling of 402408269 in words is "four hundred two million, four hundred eight thousand, two hundred sixty-nine".