123742079 has 4 divisors (see below), whose sum is σ = 130254840. Its totient is φ = 117229320.

The previous prime is 123742063. The next prime is 123742103. The reversal of 123742079 is 970247321.

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 123742079 - 2⁴ = 123742063 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 (123742009) 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, 3256352 + ... + 3256389.

It is an arithmetic number, because the mean of its divisors is an integer number (32563710).

Almost surely, 2^123742079 is an apocalyptic number.

123742079 is a gapful number since it is divisible by the number (19) formed by its first and last digit.

123742079 is a deficient number, since it is larger than the sum of its proper divisors (6512761).

123742079 is an equidigital number, since it uses as much as digits as its factorization.

123742079 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6512760.

The product of its (nonzero) digits is 21168, while the sum is 35.

The square root of 123742079 is about 11123.9417024722. The cubic root of 123742079 is about 498.3171141452.

The spelling of 123742079 in words is "one hundred twenty-three million, seven hundred forty-two thousand, seventy-nine".