730839979 has 4 divisors (see below), whose sum is σ = 773830584. Its totient is φ = 687849376.

The previous prime is 730839943. The next prime is 730840007. The reversal of 730839979 is 979938037.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 979938037 = 13 ⋅75379849.

It is a de Polignac number, because none of the positive numbers 2^k-730839979 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (730839919) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 21495277 + ... + 21495310.

It is an arithmetic number, because the mean of its divisors is an integer number (193457646).

Almost surely, 2^730839979 is an apocalyptic number.

730839979 is a deficient number, since it is larger than the sum of its proper divisors (42990605).

730839979 is a wasteful number, since it uses less digits than its factorization.

730839979 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 42990604.

The product of its (nonzero) digits is 2571912, while the sum is 55.

The square root of 730839979 is about 27034.0522119789. The cubic root of 730839979 is about 900.7565568501.

The spelling of 730839979 in words is "seven hundred thirty million, eight hundred thirty-nine thousand, nine hundred seventy-nine".