307005681 has 16 divisors (see below), whose sum is σ = 419500224. Its totient is φ = 199605504.

The previous prime is 307005637. The next prime is 307005689. The reversal of 307005681 is 186500703.

It is a de Polignac number, because none of the positive numbers 2^k-307005681 is a prime.

It is a super-2 number, since 2×307005681² = 188504976332547522, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (307005689) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 109165 + ... + 111941.

It is an arithmetic number, because the mean of its divisors is an integer number (26218764).

Almost surely, 2^307005681 is an apocalyptic number.

It is an amenable number.

307005681 is a deficient number, since it is larger than the sum of its proper divisors (112494543).

307005681 is a wasteful number, since it uses less digits than its factorization.

307005681 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3680.

The product of its (nonzero) digits is 5040, while the sum is 30.

The square root of 307005681 is about 17521.5775830831. The cubic root of 307005681 is about 674.6038322749.

The spelling of 307005681 in words is "three hundred seven million, five thousand, six hundred eighty-one".