400316659 has 2 divisors, whose sum is σ = 400316660. Its totient is φ = 400316658.

The previous prime is 400316617. The next prime is 400316669. The reversal of 400316659 is 956613004.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-400316659 is a prime.

It is not a weakly prime, because it can be changed into another prime (400316669) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 200158329 + 200158330.

It is an arithmetic number, because the mean of its divisors is an integer number (200158330).

Almost surely, 2^400316659 is an apocalyptic number.

400316659 is a deficient number, since it is larger than the sum of its proper divisors (1).

400316659 is an equidigital number, since it uses as much as digits as its factorization.

400316659 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 19440, while the sum is 34.

The square root of 400316659 is about 20007.9149088554. The cubic root of 400316659 is about 737.0006787323. Note that the first 3 decimals are identical.

The spelling of 400316659 in words is "four hundred million, three hundred sixteen thousand, six hundred fifty-nine".