404545513 has 2 divisors, whose sum is σ = 404545514. Its totient is φ = 404545512.

The previous prime is 404545489. The next prime is 404545601. The reversal of 404545513 is 315545404.

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., 223562304 + 180983209 = 14952^2 + 13453^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-404545513 is a prime.

It is a super-4 number, since 4×404545513⁴ (a number of 36 digits) contains 4444 as substring.

It is not a weakly prime, because it can be changed into another prime (404545313) 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, 202272756 + 202272757.

It is an arithmetic number, because the mean of its divisors is an integer number (202272757).

Almost surely, 2^404545513 is an apocalyptic number.

It is an amenable number.

404545513 is a deficient number, since it is larger than the sum of its proper divisors (1).

404545513 is an equidigital number, since it uses as much as digits as its factorization.

404545513 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 24000, while the sum is 31.

The square root of 404545513 is about 20113.3168075283. The cubic root of 404545513 is about 739.5867628271.

The spelling of 404545513 in words is "four hundred four million, five hundred forty-five thousand, five hundred thirteen".