30924139 has 4 divisors (see below), whose sum is σ = 32743224. Its totient is φ = 29105056.

The previous prime is 30924137. The next prime is 30924161. The reversal of 30924139 is 93142903.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 93142903 = 7 ⋅13306129.

It is a cyclic number.

It is not a de Polignac number, because 30924139 - 2¹ = 30924137 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 30924139.

It is not an unprimeable number, because it can be changed into a prime (30924137) 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, 909517 + ... + 909550.

It is an arithmetic number, because the mean of its divisors is an integer number (8185806).

Almost surely, 2^30924139 is an apocalyptic number.

30924139 is a deficient number, since it is larger than the sum of its proper divisors (1819085).

30924139 is a wasteful number, since it uses less digits than its factorization.

30924139 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1819084.

The product of its (nonzero) digits is 5832, while the sum is 31.

The square root of 30924139 is about 5560.9476710359. The cubic root of 30924139 is about 313.8816104727.

The spelling of 30924139 in words is "thirty million, nine hundred twenty-four thousand, one hundred thirty-nine".