30920661 has 12 divisors (see below), whose sum is σ = 45420960. Its totient is φ = 20264040.

The previous prime is 30920651. The next prime is 30920693. The reversal of 30920661 is 16602903.

It is a happy number.

It is not a de Polignac number, because 30920661 - 2⁶ = 30920597 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (30920651) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 28585 + ... + 29646.

It is an arithmetic number, because the mean of its divisors is an integer number (3785080).

Almost surely, 2^30920661 is an apocalyptic number.

It is an amenable number.

30920661 is a deficient number, since it is larger than the sum of its proper divisors (14500299).

30920661 is a wasteful number, since it uses less digits than its factorization.

30920661 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 58296 (or 58293 counting only the distinct ones).

The product of its (nonzero) digits is 1944, while the sum is 27.

The square root of 30920661 is about 5560.6349457593. The cubic root of 30920661 is about 313.8698427383.

The spelling of 30920661 in words is "thirty million, nine hundred twenty thousand, six hundred sixty-one".