157787023 has 4 divisors (see below), whose sum is σ = 157831848. Its totient is φ = 157742200.

The previous prime is 157787017. The next prime is 157787027. The reversal of 157787023 is 320787751.

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 157787023 - 2⁹ = 157786511 is a prime.

It is a Smith number, since the sum of its digits (40) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (157787027) 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, 16636 + ... + 24337.

It is an arithmetic number, because the mean of its divisors is an integer number (39457962).

Almost surely, 2^157787023 is an apocalyptic number.

157787023 is a deficient number, since it is larger than the sum of its proper divisors (44825).

157787023 is an equidigital number, since it uses as much as digits as its factorization.

157787023 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 44824.

The product of its (nonzero) digits is 82320, while the sum is 40.

The square root of 157787023 is about 12561.3304629725. The cubic root of 157787023 is about 540.3690013344.

It can be divided in two parts, 15778 and 7023, that added together give a square (22801 = 151²).

The spelling of 157787023 in words is "one hundred fifty-seven million, seven hundred eighty-seven thousand, twenty-three".