404688469 has 2 divisors, whose sum is σ = 404688470. Its totient is φ = 404688468.

The previous prime is 404688463. The next prime is 404688503. The reversal of 404688469 is 964886404.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 264550225 + 140138244 = 16265^2 + 11838^2 .

It is a cyclic number.

It is not a de Polignac number, because 404688469 - 2³ = 404688461 is a prime.

It is a super-2 number, since 2×404688469² = 327545513883127922, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (404688461) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 202344234 + 202344235.

It is an arithmetic number, because the mean of its divisors is an integer number (202344235).

Almost surely, 2^404688469 is an apocalyptic number.

It is an amenable number.

404688469 is a deficient number, since it is larger than the sum of its proper divisors (1).

404688469 is an equidigital number, since it uses as much as digits as its factorization.

404688469 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1327104, while the sum is 49.

The square root of 404688469 is about 20116.8702585666. The cubic root of 404688469 is about 739.6738695600.

The spelling of 404688469 in words is "four hundred four million, six hundred eighty-eight thousand, four hundred sixty-nine".