30091389 has 4 divisors (see below), whose sum is σ = 40121856. Its totient is φ = 20060924.

The previous prime is 30091367. The next prime is 30091487. The reversal of 30091389 is 98319003.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 30091389 - 2⁷ = 30091261 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (30091339) 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, 5015229 + ... + 5015234.

It is an arithmetic number, because the mean of its divisors is an integer number (10030464).

Almost surely, 2^30091389 is an apocalyptic number.

It is an amenable number.

30091389 is a deficient number, since it is larger than the sum of its proper divisors (10030467).

30091389 is a wasteful number, since it uses less digits than its factorization.

30091389 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10030466.

The product of its (nonzero) digits is 5832, while the sum is 33.

The square root of 30091389 is about 5485.5618673022. The cubic root of 30091389 is about 311.0384494944.

The spelling of 30091389 in words is "thirty million, ninety-one thousand, three hundred eighty-nine".