400000799257 has 4 divisors (see below), whose sum is σ = 400041662976. Its totient is φ = 399959935540.

The previous prime is 400000799239. The next prime is 400000799299. The reversal of 400000799257 is 752997000004.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 400000799257 - 2¹⁵ = 400000766489 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (400000499257) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 20417173 + ... + 20436754.

It is an arithmetic number, because the mean of its divisors is an integer number (100010415744).

Almost surely, 2^400000799257 is an apocalyptic number.

It is an amenable number.

400000799257 is a deficient number, since it is larger than the sum of its proper divisors (40863719).

400000799257 is an equidigital number, since it uses as much as digits as its factorization.

400000799257 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 40863718.

The product of its (nonzero) digits is 158760, while the sum is 43.

The spelling of 400000799257 in words is "four hundred billion, seven hundred ninety-nine thousand, two hundred fifty-seven".