404070731 has 2 divisors, whose sum is σ = 404070732. Its totient is φ = 404070730.

The previous prime is 404070713. The next prime is 404070757. The reversal of 404070731 is 137070404.

Together with previous prime (404070713) it forms an Ormiston pair, because they use the same digits, order apart.

It is an a-pointer prime, because the next prime (404070757) can be obtained adding 404070731 to its sum of digits (26).

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 404070731 - 2¹⁰ = 404069707 is a prime.

It is a super-2 number, since 2×404070731² = 326546311301748722, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 404070731.

It is not a weakly prime, because it can be changed into another prime (404070761) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 202035365 + 202035366.

It is an arithmetic number, because the mean of its divisors is an integer number (202035366).

Almost surely, 2^404070731 is an apocalyptic number.

404070731 is a deficient number, since it is larger than the sum of its proper divisors (1).

404070731 is an equidigital number, since it uses as much as digits as its factorization.

404070731 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2352, while the sum is 26.

The square root of 404070731 is about 20101.5106646242. The cubic root of 404070731 is about 739.2973187227.

The spelling of 404070731 in words is "four hundred four million, seventy thousand, seven hundred thirty-one".