309139690325 has 12 divisors (see below), whose sum is σ = 395698804608. Its totient is φ = 239333953200.

The previous prime is 309139690297. The next prime is 309139690381. The reversal of 309139690325 is 523096931903.

It is not a de Polignac number, because 309139690325 - 2¹⁸ = 309139428181 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 199444187 + ... + 199445736.

It is an arithmetic number, because the mean of its divisors is an integer number (32974900384).

Almost surely, 2^309139690325 is an apocalyptic number.

It is an amenable number.

309139690325 is a deficient number, since it is larger than the sum of its proper divisors (86559114283).

309139690325 is a wasteful number, since it uses less digits than its factorization.

309139690325 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 398889964 (or 398889959 counting only the distinct ones).

The product of its (nonzero) digits is 1180980, while the sum is 50.

The spelling of 309139690325 in words is "three hundred nine billion, one hundred thirty-nine million, six hundred ninety thousand, three hundred twenty-five".