400704347 has 2 divisors, whose sum is σ = 400704348. Its totient is φ = 400704346.

The previous prime is 400704289. The next prime is 400704379. The reversal of 400704347 is 743407004.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-400704347 is a prime.

It is not a weakly prime, because it can be changed into another prime (400704247) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 200352173 + 200352174.

It is an arithmetic number, because the mean of its divisors is an integer number (200352174).

Almost surely, 2^400704347 is an apocalyptic number.

400704347 is a deficient number, since it is larger than the sum of its proper divisors (1).

400704347 is an equidigital number, since it uses as much as digits as its factorization.

400704347 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 9408, while the sum is 29.

The square root of 400704347 is about 20017.6009301814. The cubic root of 400704347 is about 737.2385188894.

The spelling of 400704347 in words is "four hundred million, seven hundred four thousand, three hundred forty-seven".