123620039 has 6 divisors (see below), whose sum is σ = 131319864. Its totient is φ = 116348000.

The previous prime is 123619999. The next prime is 123620041. The reversal of 123620039 is 930026321.

It is not a de Polignac number, because 123620039 - 2¹⁶ = 123554503 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 (123620059) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 213587 + ... + 214164.

It is an arithmetic number, because the mean of its divisors is an integer number (21886644).

Almost surely, 2^123620039 is an apocalyptic number.

123620039 is a deficient number, since it is larger than the sum of its proper divisors (7699825).

123620039 is an equidigital number, since it uses as much as digits as its factorization.

123620039 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 427785 (or 427768 counting only the distinct ones).

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

The square root of 123620039 is about 11118.4548836608. The cubic root of 123620039 is about 498.1532393481.

The spelling of 123620039 in words is "one hundred twenty-three million, six hundred twenty thousand, thirty-nine".