30117439 has 4 divisors (see below), whose sum is σ = 32855400. Its totient is φ = 27379480.

The previous prime is 30117431. The next prime is 30117443. The reversal of 30117439 is 93471103.

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 30117439 - 2³ = 30117431 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (30117431) 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, 1368964 + ... + 1368985.

It is an arithmetic number, because the mean of its divisors is an integer number (8213850).

Almost surely, 2^30117439 is an apocalyptic number.

30117439 is a deficient number, since it is larger than the sum of its proper divisors (2737961).

30117439 is a wasteful number, since it uses less digits than its factorization.

30117439 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2737960.

The product of its (nonzero) digits is 2268, while the sum is 28.

The square root of 30117439 is about 5487.9357685746. The cubic root of 30117439 is about 311.1281785374.

The spelling of 30117439 in words is "thirty million, one hundred seventeen thousand, four hundred thirty-nine".