120023639 has 4 divisors (see below), whose sum is σ = 120106056. Its totient is φ = 119941224.

The previous prime is 120023633. The next prime is 120023647. The reversal of 120023639 is 936320021.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 120023639 - 2⁴ = 120023623 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 (120023633) 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, 38984 + ... + 41949.

It is an arithmetic number, because the mean of its divisors is an integer number (30026514).

Almost surely, 2^120023639 is an apocalyptic number.

120023639 is a deficient number, since it is larger than the sum of its proper divisors (82417).

120023639 is an equidigital number, since it uses as much as digits as its factorization.

120023639 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 82416.

The product of its (nonzero) digits is 1944, while the sum is 26.

The square root of 120023639 is about 10955.5300647664. The cubic root of 120023639 is about 493.2748009547.

The spelling of 120023639 in words is "one hundred twenty million, twenty-three thousand, six hundred thirty-nine".