307308861 has 12 divisors (see below), whose sum is σ = 444591420. Its totient is φ = 204549120.

The previous prime is 307308857. The next prime is 307308871. The reversal of 307308861 is 168803703.

It can be written as a sum of positive squares in 2 ways, for example, as 149303961 + 158004900 = 12219^2 + 12570^2 .

It is not a de Polignac number, because 307308861 - 2² = 307308857 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (307308821) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 20866 + ... + 32403.

It is an arithmetic number, because the mean of its divisors is an integer number (37049285).

Almost surely, 2^307308861 is an apocalyptic number.

It is an amenable number.

307308861 is a deficient number, since it is larger than the sum of its proper divisors (137282559).

307308861 is a wasteful number, since it uses less digits than its factorization.

307308861 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 53916 (or 53913 counting only the distinct ones).

The product of its (nonzero) digits is 24192, while the sum is 36.

The square root of 307308861 is about 17530.2270664130. The cubic root of 307308861 is about 674.8258250191.

The spelling of 307308861 in words is "three hundred seven million, three hundred eight thousand, eight hundred sixty-one".