30664139 has 4 divisors (see below), whose sum is σ = 33451800. Its totient is φ = 27876480.

The previous prime is 30664111. The next prime is 30664147. The reversal of 30664139 is 93146603.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 30664139 - 2¹² = 30660043 is a prime.

It is a super-2 number, since 2×30664139² = 1880578841222642, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (30664159) 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, 1393814 + ... + 1393835.

It is an arithmetic number, because the mean of its divisors is an integer number (8362950).

Almost surely, 2^30664139 is an apocalyptic number.

30664139 is a deficient number, since it is larger than the sum of its proper divisors (2787661).

30664139 is a wasteful number, since it uses less digits than its factorization.

30664139 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2787660.

The product of its (nonzero) digits is 11664, while the sum is 32.

The square root of 30664139 is about 5537.5210157615. The cubic root of 30664139 is about 312.9994624141. Note that the first 3 decimals are identical.

It can be divided in two parts, 30664 and 139, that added together give a palindrome (30803).

The spelling of 30664139 in words is "thirty million, six hundred sixty-four thousand, one hundred thirty-nine".