387157273 has 4 divisors (see below), whose sum is σ = 387838260. Its totient is φ = 386476288.

The previous prime is 387157259. The next prime is 387157291. The reversal of 387157273 is 372751783.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 126270169 + 260887104 = 11237^2 + 16152^2 .

It is a cyclic number.

It is not a de Polignac number, because 387157273 - 2⁵ = 387157241 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (387158273) 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, 339640 + ... + 340777.

It is an arithmetic number, because the mean of its divisors is an integer number (96959565).

Almost surely, 2^387157273 is an apocalyptic number.

It is an amenable number.

387157273 is a deficient number, since it is larger than the sum of its proper divisors (680987).

387157273 is an equidigital number, since it uses as much as digits as its factorization.

387157273 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 680986.

The product of its digits is 246960, while the sum is 43.

The square root of 387157273 is about 19676.3124848128. The cubic root of 387157273 is about 728.8348668164.

The spelling of 387157273 in words is "three hundred eighty-seven million, one hundred fifty-seven thousand, two hundred seventy-three".