396724900085 has 4 divisors (see below), whose sum is σ = 476069880108. Its totient is φ = 317379920064.

The previous prime is 396724900067. The next prime is 396724900133. The reversal of 396724900085 is 580009427693.

It is a happy number.

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

It can be written as a sum of positive squares in 2 ways, for example, as 306197329201 + 90527570884 = 553351^2 + 300878^2 .

It is a cyclic number.

It is not a de Polignac number, because 396724900085 - 2²⁴ = 396708122869 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 39672490004 + ... + 39672490013.

It is an arithmetic number, because the mean of its divisors is an integer number (119017470027).

Almost surely, 2^396724900085 is an apocalyptic number.

It is an amenable number.

396724900085 is a deficient number, since it is larger than the sum of its proper divisors (79344980023).

396724900085 is an equidigital number, since it uses as much as digits as its factorization.

396724900085 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 79344980022.

The product of its (nonzero) digits is 3265920, while the sum is 53.

The spelling of 396724900085 in words is "three hundred ninety-six billion, seven hundred twenty-four million, nine hundred thousand, eighty-five".