400806713 has 8 divisors (see below), whose sum is σ = 404782728. Its totient is φ = 396849024.

The previous prime is 400806697. The next prime is 400806733. The reversal of 400806713 is 317608004.

It can be written as a sum of positive squares in 4 ways, for example, as 233570089 + 167236624 = 15283^2 + 12932^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 400806713 - 2⁴ = 400806697 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (400806733) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 41645 + ... + 50357.

It is an arithmetic number, because the mean of its divisors is an integer number (50597841).

Almost surely, 2^400806713 is an apocalyptic number.

It is an amenable number.

400806713 is a deficient number, since it is larger than the sum of its proper divisors (3976015).

400806713 is a wasteful number, since it uses less digits than its factorization.

400806713 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9163.

The product of its (nonzero) digits is 4032, while the sum is 29.

The square root of 400806713 is about 20020.1576667118. The cubic root of 400806713 is about 737.3012931294.

The spelling of 400806713 in words is "four hundred million, eight hundred six thousand, seven hundred thirteen".