30980911 has 6 divisors (see below), whose sum is σ = 33547560. Its totient is φ = 28597608.

The previous prime is 30980899. The next prime is 30980923. The reversal of 30980911 is 11908903.

It is an interprime number because it is at equal distance from previous prime (30980899) and next prime (30980923).

It is not a de Polignac number, because 30980911 - 2²¹ = 28883759 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 (30980111) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 91491 + ... + 91828.

It is an arithmetic number, because the mean of its divisors is an integer number (5591260).

Almost surely, 2^30980911 is an apocalyptic number.

30980911 is a deficient number, since it is larger than the sum of its proper divisors (2566649).

30980911 is a wasteful number, since it uses less digits than its factorization.

30980911 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 183345 (or 183332 counting only the distinct ones).

The product of its (nonzero) digits is 1944, while the sum is 31.

The square root of 30980911 is about 5566.0498560469. The cubic root of 30980911 is about 314.0735726284.

The spelling of 30980911 in words is "thirty million, nine hundred eighty thousand, nine hundred eleven".