387919157 has 4 divisors (see below), whose sum is σ = 387984780. Its totient is φ = 387853536.

The previous prime is 387919139. The next prime is 387919171. The reversal of 387919157 is 751919783.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 751919783 = 73 ⋅10300271.

It can be written as a sum of positive squares in 2 ways, for example, as 376903396 + 11015761 = 19414^2 + 3319^2 .

It is a cyclic number.

It is not a de Polignac number, because 387919157 - 2⁶ = 387919093 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 (387919117) 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, 22958 + ... + 36095.

It is an arithmetic number, because the mean of its divisors is an integer number (96996195).

Almost surely, 2^387919157 is an apocalyptic number.

It is an amenable number.

387919157 is a deficient number, since it is larger than the sum of its proper divisors (65623).

387919157 is an equidigital number, since it uses as much as digits as its factorization.

387919157 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 65622.

The product of its digits is 476280, while the sum is 50.

The square root of 387919157 is about 19695.6634059379. The cubic root of 387919157 is about 729.3126431717.

The spelling of 387919157 in words is "three hundred eighty-seven million, nine hundred nineteen thousand, one hundred fifty-seven".