30749939 has 8 divisors (see below), whose sum is σ = 33587568. Its totient is φ = 27919360.

The previous prime is 30749903. The next prime is 30749963. The reversal of 30749939 is 93994703.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 30749939 - 2⁸ = 30749683 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 30749939.

It is not an unprimeable number, because it can be changed into a prime (30749989) 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, 12239 + ... + 14535.

It is an arithmetic number, because the mean of its divisors is an integer number (4198446).

Almost surely, 2^30749939 is an apocalyptic number.

30749939 is a deficient number, since it is larger than the sum of its proper divisors (2837629).

30749939 is a wasteful number, since it uses less digits than its factorization.

30749939 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3525.

The product of its (nonzero) digits is 183708, while the sum is 44.

The square root of 30749939 is about 5545.2627530172. The cubic root of 30749939 is about 313.2911206399.

The spelling of 30749939 in words is "thirty million, seven hundred forty-nine thousand, nine hundred thirty-nine".