30755979 has 12 divisors (see below), whose sum is σ = 45957600. Its totient is φ = 19796784.

The previous prime is 30755969. The next prime is 30755983. The reversal of 30755979 is 97955703.

It is a happy number.

It is a de Polignac number, because none of the positive numbers 2^k-30755979 is a prime.

It is not an unprimeable number, because it can be changed into a prime (30755909) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 58659 + ... + 59180.

It is an arithmetic number, because the mean of its divisors is an integer number (3829800).

Almost surely, 2^30755979 is an apocalyptic number.

30755979 is a deficient number, since it is larger than the sum of its proper divisors (15201621).

30755979 is a wasteful number, since it uses less digits than its factorization.

30755979 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 117874 (or 117871 counting only the distinct ones).

The product of its (nonzero) digits is 297675, while the sum is 45.

The square root of 30755979 is about 5545.8073352759. The cubic root of 30755979 is about 313.3116318404.

The spelling of 30755979 in words is "thirty million, seven hundred fifty-five thousand, nine hundred seventy-nine".