30189123 has 12 divisors (see below), whose sum is σ = 43723680. Its totient is φ = 20072016.

The previous prime is 30189113. The next prime is 30189167. The reversal of 30189123 is 32198103.

It is not a de Polignac number, because 30189123 - 2⁹ = 30188611 is a prime.

It is a super-2 number, since 2×30189123² = 1822766295018258, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (30189113) 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, 811 + ... + 7812.

It is an arithmetic number, because the mean of its divisors is an integer number (3643640).

Almost surely, 2^30189123 is an apocalyptic number.

30189123 is a deficient number, since it is larger than the sum of its proper divisors (13534557).

30189123 is a wasteful number, since it uses less digits than its factorization.

30189123 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9018 (or 9015 counting only the distinct ones).

The product of its (nonzero) digits is 1296, while the sum is 27.

The square root of 30189123 is about 5494.4629400880. The cubic root of 30189123 is about 311.3748267884.

The spelling of 30189123 in words is "thirty million, one hundred eighty-nine thousand, one hundred twenty-three".