123839401 has 4 divisors (see below), whose sum is σ = 141530752. Its totient is φ = 106148052.

The previous prime is 123839381. The next prime is 123839411. The reversal of 123839401 is 104938321.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 104938321 = 1319 ⋅79559.

It is a cyclic number.

It is not a de Polignac number, because 123839401 - 2¹⁹ = 123315113 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (123839411) 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, 8845665 + ... + 8845678.

It is an arithmetic number, because the mean of its divisors is an integer number (35382688).

Almost surely, 2^123839401 is an apocalyptic number.

It is an amenable number.

123839401 is a deficient number, since it is larger than the sum of its proper divisors (17691351).

123839401 is an equidigital number, since it uses as much as digits as its factorization.

123839401 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17691350.

The product of its (nonzero) digits is 5184, while the sum is 31.

The square root of 123839401 is about 11128.3152812993. The cubic root of 123839401 is about 498.4477205105.

The spelling of 123839401 in words is "one hundred twenty-three million, eight hundred thirty-nine thousand, four hundred one".