30869939 has 4 divisors (see below), whose sum is σ = 30881640. Its totient is φ = 30858240.

The previous prime is 30869911. The next prime is 30869953. The reversal of 30869939 is 93996803.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length, and also an emirpimes, since its reverse is a distinct semiprime: 93996803 = 449 ⋅209347.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-30869939 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 30869893 and 30869902.

It is not an unprimeable number, because it can be changed into a prime (30869989) 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, 179 + ... + 7859.

It is an arithmetic number, because the mean of its divisors is an integer number (7720410).

Almost surely, 2^30869939 is an apocalyptic number.

30869939 is a deficient number, since it is larger than the sum of its proper divisors (11701).

30869939 is an equidigital number, since it uses as much as digits as its factorization.

30869939 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11700.

The product of its (nonzero) digits is 314928, while the sum is 47.

The square root of 30869939 is about 5556.0722637489. The cubic root of 30869939 is about 313.6981256332.

The spelling of 30869939 in words is "thirty million, eight hundred sixty-nine thousand, nine hundred thirty-nine".