309397636397 has 8 divisors (see below), whose sum is σ = 317770290432. Its totient is φ = 301025538000.

The previous prime is 309397636391. The next prime is 309397636417. The reversal of 309397636397 is 793636793903.

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-309397636397 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (309397636391) 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, 1149272 + ... + 1392702.

It is an arithmetic number, because the mean of its divisors is an integer number (39721286304).

Almost surely, 2^309397636397 is an apocalyptic number.

309397636397 is a gapful number since it is divisible by the number (37) formed by its first and last digit.

It is an amenable number.

309397636397 is a deficient number, since it is larger than the sum of its proper divisors (8372654035).

309397636397 is a wasteful number, since it uses less digits than its factorization.

309397636397 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 277819.

The product of its (nonzero) digits is 104162436, while the sum is 65.

The spelling of 309397636397 in words is "three hundred nine billion, three hundred ninety-seven million, six hundred thirty-six thousand, three hundred ninety-seven".