404125669 has 2 divisors, whose sum is σ = 404125670. Its totient is φ = 404125668.

The previous prime is 404125661. The next prime is 404125723. The reversal of 404125669 is 966521404.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 371063169 + 33062500 = 19263^2 + 5750^2 .

It is a cyclic number.

It is not a de Polignac number, because 404125669 - 2³ = 404125661 is a prime.

It is a super-2 number, since 2×404125669² = 326635112689395122, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (404125661) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 202062834 + 202062835.

It is an arithmetic number, because the mean of its divisors is an integer number (202062835).

Almost surely, 2^404125669 is an apocalyptic number.

It is an amenable number.

404125669 is a deficient number, since it is larger than the sum of its proper divisors (1).

404125669 is an equidigital number, since it uses as much as digits as its factorization.

404125669 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 51840, while the sum is 37.

The square root of 404125669 is about 20102.8771323908. The cubic root of 404125669 is about 739.3308224902.

The spelling of 404125669 in words is "four hundred four million, one hundred twenty-five thousand, six hundred sixty-nine".