123913857 has 8 divisors (see below), whose sum is σ = 172401984. Its totient is φ = 79017488.

The previous prime is 123913847. The next prime is 123913859. The reversal of 123913857 is 758319321.

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

It is a cyclic number.

It is not a de Polignac number, because 123913857 - 2¹² = 123909761 is a prime.

It is not an unprimeable number, because it can be changed into a prime (123913859) 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, 897858 + ... + 897995.

It is an arithmetic number, because the mean of its divisors is an integer number (21550248).

Almost surely, 2^123913857 is an apocalyptic number.

It is an amenable number.

123913857 is a deficient number, since it is larger than the sum of its proper divisors (48488127).

123913857 is a wasteful number, since it uses less digits than its factorization.

123913857 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1795879.

The product of its digits is 45360, while the sum is 39.

The square root of 123913857 is about 11131.6601187783. The cubic root of 123913857 is about 498.5475944547.

The spelling of 123913857 in words is "one hundred twenty-three million, nine hundred thirteen thousand, eight hundred fifty-seven".