30236939 has 4 divisors (see below), whose sum is σ = 30390624. Its totient is φ = 30083256.

The previous prime is 30236929. The next prime is 30236953. The reversal of 30236939 is 93963203.

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 30236939 - 2⁸ = 30236683 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 30236899 and 30236908.

It is not an unprimeable number, because it can be changed into a prime (30236909) 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, 76547 + ... + 76940.

It is an arithmetic number, because the mean of its divisors is an integer number (7597656).

Almost surely, 2^30236939 is an apocalyptic number.

30236939 is a deficient number, since it is larger than the sum of its proper divisors (153685).

30236939 is a wasteful number, since it uses less digits than its factorization.

30236939 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 153684.

The product of its (nonzero) digits is 26244, while the sum is 35.

The square root of 30236939 is about 5498.8125081694. The cubic root of 30236939 is about 311.5391337032.

The spelling of 30236939 in words is "thirty million, two hundred thirty-six thousand, nine hundred thirty-nine".