387557123 has 4 divisors (see below), whose sum is σ = 387799008. Its totient is φ = 387315240.

The previous prime is 387557111. The next prime is 387557141. The reversal of 387557123 is 321755783.

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 387557123 - 2²⁰ = 386508547 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (387557623) 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, 118523 + ... + 121748.

It is an arithmetic number, because the mean of its divisors is an integer number (96949752).

Almost surely, 2^387557123 is an apocalyptic number.

387557123 is a deficient number, since it is larger than the sum of its proper divisors (241885).

387557123 is a wasteful number, since it uses less digits than its factorization.

387557123 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 241884.

The product of its digits is 176400, while the sum is 41.

The square root of 387557123 is about 19686.4705572126. The cubic root of 387557123 is about 729.0856902526.

The spelling of 387557123 in words is "three hundred eighty-seven million, five hundred fifty-seven thousand, one hundred twenty-three".