30939901 has 4 divisors (see below), whose sum is σ = 30971932. Its totient is φ = 30907872.

The previous prime is 30939869. The next prime is 30939907. The reversal of 30939901 is 10993903.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 10993903 = 89 ⋅123527.

It can be written as a sum of positive squares in 2 ways, for example, as 23912100 + 7027801 = 4890^2 + 2651^2 .

It is a cyclic number.

It is not a de Polignac number, because 30939901 - 2⁵ = 30939869 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 (30939907) 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, 14520 + ... + 16513.

It is an arithmetic number, because the mean of its divisors is an integer number (7742983).

Almost surely, 2^30939901 is an apocalyptic number.

It is an amenable number.

30939901 is a deficient number, since it is larger than the sum of its proper divisors (32031).

30939901 is an equidigital number, since it uses as much as digits as its factorization.

30939901 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 32030.

The product of its (nonzero) digits is 6561, while the sum is 34.

The square root of 30939901 is about 5562.3646949836. The cubic root of 30939901 is about 313.9349297866.

The spelling of 30939901 in words is "thirty million, nine hundred thirty-nine thousand, nine hundred one".