123401279 has 8 divisors (see below), whose sum is σ = 128993280. Its totient is φ = 117828216.

The previous prime is 123401261. The next prime is 123401309. The reversal of 123401279 is 972104321.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-123401279 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 (123401209) 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, 9542 + ... + 18380.

It is an arithmetic number, because the mean of its divisors is an integer number (16124160).

Almost surely, 2^123401279 is an apocalyptic number.

123401279 is a deficient number, since it is larger than the sum of its proper divisors (5592001).

123401279 is an equidigital number, since it uses as much as digits as its factorization.

123401279 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9469.

The product of its (nonzero) digits is 3024, while the sum is 29.

The square root of 123401279 is about 11108.6128296921. The cubic root of 123401279 is about 497.8592191965.

The spelling of 123401279 in words is "one hundred twenty-three million, four hundred one thousand, two hundred seventy-nine".