387903057 has 4 divisors (see below), whose sum is σ = 517204080. Its totient is φ = 258602036.

The previous prime is 387903041. The next prime is 387903071. The reversal of 387903057 is 750309783.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 387903057 - 2⁴ = 387903041 is a prime.

It is not an unprimeable number, because it can be changed into a prime (387903007) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 64650507 + ... + 64650512.

It is an arithmetic number, because the mean of its divisors is an integer number (129301020).

Almost surely, 2^387903057 is an apocalyptic number.

It is an amenable number.

387903057 is a deficient number, since it is larger than the sum of its proper divisors (129301023).

387903057 is a wasteful number, since it uses less digits than its factorization.

387903057 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 129301022.

The product of its (nonzero) digits is 158760, while the sum is 42.

The square root of 387903057 is about 19695.2546822832. The cubic root of 387903057 is about 729.3025533581.

The spelling of 387903057 in words is "three hundred eighty-seven million, nine hundred three thousand, fifty-seven".