397721626623359 has 8 divisors (see below), whose sum is σ = 405226351558080. Its totient is φ = 390216921810976.

The previous prime is 397721626623353. The next prime is 397721626623361. The reversal of 397721626623359 is 953326626127793.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-397721626623359 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 397721626623292 and 397721626623301.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (397721626623353) 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, 38372762 + ... + 47622600.

It is an arithmetic number, because the mean of its divisors is an integer number (50653293944760).

Almost surely, 2^{397721626623359} is an apocalyptic number.

397721626623359 is a deficient number, since it is larger than the sum of its proper divisors (7504724934721).

397721626623359 is an equidigital number, since it uses as much as digits as its factorization.

397721626623359 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10061169.

The product of its digits is 925888320, while the sum is 71.

The spelling of 397721626623359 in words is "three hundred ninety-seven trillion, seven hundred twenty-one billion, six hundred twenty-six million, six hundred twenty-three thousand, three hundred fifty-nine".