307640013 has 8 divisors (see below), whose sum is σ = 411701376. Its totient is φ = 204336000.

The previous prime is 307640009. The next prime is 307640023. The reversal of 307640013 is 310046703.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 307640013 - 2² = 307640009 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 (307640023) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 188388 + ... + 190013.

It is an arithmetic number, because the mean of its divisors is an integer number (51462672).

Almost surely, 2^307640013 is an apocalyptic number.

It is an amenable number.

307640013 is a deficient number, since it is larger than the sum of its proper divisors (104061363).

307640013 is a wasteful number, since it uses less digits than its factorization.

307640013 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 378675.

The product of its (nonzero) digits is 1512, while the sum is 24.

The square root of 307640013 is about 17539.6696947234. The cubic root of 307640013 is about 675.0681324917.

Adding to 307640013 its reverse (310046703), we get a palindrome (617686716).

The spelling of 307640013 in words is "three hundred seven million, six hundred forty thousand, thirteen".