30040123 has 4 divisors (see below), whose sum is σ = 30154608. Its totient is φ = 29925640.

The previous prime is 30040117. The next prime is 30040133. The reversal of 30040123 is 32104003.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 32104003 = 31 ⋅1035613.

It is a cyclic number.

It is not a de Polignac number, because 30040123 - 2¹⁷ = 29909051 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (30040103) 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, 56848 + ... + 57373.

It is an arithmetic number, because the mean of its divisors is an integer number (7538652).

Almost surely, 2^30040123 is an apocalyptic number.

30040123 is a deficient number, since it is larger than the sum of its proper divisors (114485).

30040123 is a wasteful number, since it uses less digits than its factorization.

30040123 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 114484.

The product of its (nonzero) digits is 72, while the sum is 13.

The square root of 30040123 is about 5480.8870632408. The cubic root of 30040123 is about 310.8617127633.

Adding to 30040123 its reverse (32104003), we get a palindrome (62144126).

The spelling of 30040123 in words is "thirty million, forty thousand, one hundred twenty-three".