123902439 has 8 divisors (see below), whose sum is σ = 173898240. Its totient is φ = 78254136.

The previous prime is 123902399. The next prime is 123902447. The reversal of 123902439 is 934209321.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 123902439 - 2¹¹ = 123900391 is a prime.

123902439 is a modest number, since divided by 2439 gives 1239 as remainder.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (123902459) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1086807 + ... + 1086920.

It is an arithmetic number, because the mean of its divisors is an integer number (21737280).

Almost surely, 2^123902439 is an apocalyptic number.

123902439 is a gapful number since it is divisible by the number (19) formed by its first and last digit.

123902439 is a deficient number, since it is larger than the sum of its proper divisors (49995801).

123902439 is a wasteful number, since it uses less digits than its factorization.

123902439 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2173749.

The product of its (nonzero) digits is 11664, while the sum is 33.

The square root of 123902439 is about 11131.1472454550. The cubic root of 123902439 is about 498.5322811518.

The spelling of 123902439 in words is "one hundred twenty-three million, nine hundred two thousand, four hundred thirty-nine".