400704539 has 4 divisors (see below), whose sum is σ = 408265056. Its totient is φ = 393144024.

The previous prime is 400704533. The next prime is 400704541. The reversal of 400704539 is 935407004.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 400704539 - 2⁴ = 400704523 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (400704533) 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, 3780179 + ... + 3780284.

It is an arithmetic number, because the mean of its divisors is an integer number (102066264).

Almost surely, 2^400704539 is an apocalyptic number.

400704539 is a deficient number, since it is larger than the sum of its proper divisors (7560517).

400704539 is an equidigital number, since it uses as much as digits as its factorization.

400704539 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7560516.

The product of its (nonzero) digits is 15120, while the sum is 32.

The square root of 400704539 is about 20017.6057259603. The cubic root of 400704539 is about 737.2386366402.

The spelling of 400704539 in words is "four hundred million, seven hundred four thousand, five hundred thirty-nine".