307870729321 has 9 divisors (see below), whose sum is σ = 310946506941. Its totient is φ = 304825097292.

The previous prime is 307870729301. The next prime is 307870729367. The reversal of 307870729321 is 123927078703.

It is a happy number.

The square root of 307870729321 is 554861.

It is a perfect power (a square), and thus also a powerful number.

It is not a de Polignac number, because 307870729321 - 2⁵ = 307870729289 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (307870729301) by changing a digit.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 57147990 + ... + 57153376.

Almost surely, 2^307870729321 is an apocalyptic number.

307870729321 is the 554861-st square number.

307870729321 is the 277431-st centered octagonal number.

It is an amenable number.

307870729321 is a deficient number, since it is larger than the sum of its proper divisors (3075777620).

307870729321 is an frugal number, since it uses more digits than its factorization.

307870729321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10980 (or 5490 counting only the distinct ones).

The product of its (nonzero) digits is 889056, while the sum is 49.

Multiplying 307870729321 by its sum of digits (49), we get a square (15085665736729 = 3884027²).

The spelling of 307870729321 in words is "three hundred seven billion, eight hundred seventy million, seven hundred twenty-nine thousand, three hundred twenty-one".