157243369 has 4 divisors (see below), whose sum is σ = 157269060. Its totient is φ = 157217680.

The previous prime is 157243367. The next prime is 157243379. The reversal of 157243369 is 963342751.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It can be written as a sum of positive squares in 2 ways, for example, as 136422400 + 20820969 = 11680^2 + 4563^2 .

It is a cyclic number.

It is not a de Polignac number, because 157243369 - 2¹ = 157243367 is a prime.

It is a super-2 number, since 2×157243369² = 49450954188940322, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (157243367) 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, 2247 + ... + 17875.

It is an arithmetic number, because the mean of its divisors is an integer number (39317265).

Almost surely, 2^157243369 is an apocalyptic number.

It is an amenable number.

157243369 is a deficient number, since it is larger than the sum of its proper divisors (25691).

157243369 is a wasteful number, since it uses less digits than its factorization.

157243369 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25690.

The product of its digits is 136080, while the sum is 40.

The square root of 157243369 is about 12539.6718059126. The cubic root of 157243369 is about 539.7476747529.

The spelling of 157243369 in words is "one hundred fifty-seven million, two hundred forty-three thousand, three hundred sixty-nine".