307508013 has 12 divisors (see below), whose sum is σ = 444729948. Its totient is φ = 204750720.

The previous prime is 307508011. The next prime is 307508023. The reversal of 307508013 is 310805703.

It can be written as a sum of positive squares in 2 ways, for example, as 232806564 + 74701449 = 15258^2 + 8643^2 .

It is not a de Polignac number, because 307508013 - 2¹ = 307508011 is a prime.

It is a super-2 number, since 2×307508013² = 189122356118416338, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (307508011) 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, 13420 + ... + 28197.

It is an arithmetic number, because the mean of its divisors is an integer number (37060829).

Almost surely, 2^307508013 is an apocalyptic number.

It is an amenable number.

307508013 is a deficient number, since it is larger than the sum of its proper divisors (137221935).

307508013 is a wasteful number, since it uses less digits than its factorization.

307508013 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 42444 (or 42441 counting only the distinct ones).

The product of its (nonzero) digits is 2520, while the sum is 27.

The square root of 307508013 is about 17535.9063923140. The cubic root of 307508013 is about 674.9715675267.

The spelling of 307508013 in words is "three hundred seven million, five hundred eight thousand, thirteen".