297423157 has 4 divisors (see below), whose sum is σ = 299142540. Its totient is φ = 295703776.

The previous prime is 297423103. The next prime is 297423163. The reversal of 297423157 is 751324792.

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 154405476 + 143017681 = 12426^2 + 11959^2 .

It is a cyclic number.

It is not a de Polignac number, because 297423157 - 2¹⁹ = 296898869 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 (297423167) 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, 859432 + ... + 859777.

It is an arithmetic number, because the mean of its divisors is an integer number (74785635).

Almost surely, 2^297423157 is an apocalyptic number.

It is an amenable number.

297423157 is a deficient number, since it is larger than the sum of its proper divisors (1719383).

297423157 is a wasteful number, since it uses less digits than its factorization.

297423157 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1719382.

The product of its digits is 105840, while the sum is 40.

The square root of 297423157 is about 17245.9605995143. The cubic root of 297423157 is about 667.5107430460.

The spelling of 297423157 in words is "two hundred ninety-seven million, four hundred twenty-three thousand, one hundred fifty-seven".