30883939 has 4 divisors (see below), whose sum is σ = 31022656. Its totient is φ = 30745224.

The previous prime is 30883921. The next prime is 30883943. The reversal of 30883939 is 93938803.

30883939 = 7² + 8² + ... + 452².

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 93938803 = 7 ⋅13419829.

It is a cyclic number.

It is not a de Polignac number, because 30883939 - 2⁵ = 30883907 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 30883895 and 30883904.

It is not an unprimeable number, because it can be changed into a prime (30883969) 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, 69024 + ... + 69469.

It is an arithmetic number, because the mean of its divisors is an integer number (7755664).

Almost surely, 2^30883939 is an apocalyptic number.

30883939 is a deficient number, since it is larger than the sum of its proper divisors (138717).

30883939 is a wasteful number, since it uses less digits than its factorization.

30883939 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 138716.

The product of its (nonzero) digits is 139968, while the sum is 43.

The square root of 30883939 is about 5557.3320037586. The cubic root of 30883939 is about 313.7455408011.

The spelling of 30883939 in words is "thirty million, eight hundred eighty-three thousand, nine hundred thirty-nine".