307968639 has 8 divisors (see below), whose sum is σ = 447954432. Its totient is φ = 186647640.

The previous prime is 307968631. The next prime is 307968641. The reversal of 307968639 is 936869703.

It is a happy number.

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

It is not a de Polignac number, because 307968639 - 2³ = 307968631 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 307968591 and 307968600.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (307968631) 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, 4666159 + ... + 4666224.

It is an arithmetic number, because the mean of its divisors is an integer number (55994304).

Almost surely, 2^307968639 is an apocalyptic number.

307968639 is a deficient number, since it is larger than the sum of its proper divisors (139985793).

307968639 is a wasteful number, since it uses less digits than its factorization.

307968639 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9332397.

The product of its (nonzero) digits is 1469664, while the sum is 51.

The square root of 307968639 is about 17549.0352726297. The cubic root of 307968639 is about 675.3084198241.

The spelling of 307968639 in words is "three hundred seven million, nine hundred sixty-eight thousand, six hundred thirty-nine".