309763939397 has 12 divisors (see below), whose sum is σ = 343855475628. Its totient is φ = 278815416000.

The previous prime is 309763939369. The next prime is 309763939409. The reversal of 309763939397 is 793939367903.

It can be written as a sum of positive squares in 2 ways, for example, as 133001713636 + 176762225761 = 364694^2 + 420431^2 .

It is not a de Polignac number, because 309763939397 - 2⁶ = 309763939333 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 (309763939307) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 12661208 + ... + 12685649.

It is an arithmetic number, because the mean of its divisors is an integer number (28654622969).

Almost surely, 2^309763939397 is an apocalyptic number.

It is an amenable number.

309763939397 is a deficient number, since it is larger than the sum of its proper divisors (34091536231).

309763939397 is a wasteful number, since it uses less digits than its factorization.

309763939397 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25346980 (or 25346969 counting only the distinct ones).

The product of its (nonzero) digits is 156243654, while the sum is 68.

The spelling of 309763939397 in words is "three hundred nine billion, seven hundred sixty-three million, nine hundred thirty-nine thousand, three hundred ninety-seven".