30986091 has 32 divisors (see below), whose sum is σ = 47360000. Its totient is φ = 20015424.

The previous prime is 30986089. The next prime is 30986107. The reversal of 30986091 is 19068903.

It is not a de Polignac number, because 30986091 - 2¹ = 30986089 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (30986191) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 155610 + ... + 155808.

It is an arithmetic number, because the mean of its divisors is an integer number (1480000).

Almost surely, 2^30986091 is an apocalyptic number.

30986091 is a deficient number, since it is larger than the sum of its proper divisors (16373909).

30986091 is a wasteful number, since it uses less digits than its factorization.

30986091 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 360 (or 354 counting only the distinct ones).

The product of its (nonzero) digits is 11664, while the sum is 36.

The square root of 30986091 is about 5566.5151576188. The cubic root of 30986091 is about 314.0910759920.

The spelling of 30986091 in words is "thirty million, nine hundred eighty-six thousand, ninety-one".