123199557 has 8 divisors (see below), whose sum is σ = 176901984. Its totient is φ = 75815088.

The previous prime is 123199501. The next prime is 123199567. The reversal of 123199557 is 755991321.

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

It is not a de Polignac number, because 123199557 - 2¹⁵ = 123166789 is a prime.

It is a Smith number, since the sum of its digits (42) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (123199567) 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, 1579443 + ... + 1579520.

It is an arithmetic number, because the mean of its divisors is an integer number (22112748).

Almost surely, 2^123199557 is an apocalyptic number.

It is an amenable number.

123199557 is a deficient number, since it is larger than the sum of its proper divisors (53702427).

123199557 is a wasteful number, since it uses less digits than its factorization.

123199557 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3158979.

The product of its digits is 85050, while the sum is 42.

The square root of 123199557 is about 11099.5295846265. The cubic root of 123199557 is about 497.5877905391.

The spelling of 123199557 in words is "one hundred twenty-three million, one hundred ninety-nine thousand, five hundred fifty-seven".