157749273 has 36 divisors (see below), whose sum is σ = 265221684. Its totient is φ = 89971200.

The previous prime is 157749259. The next prime is 157749311. The reversal of 157749273 is 372947751.

157749273 is a `hidden beast` number, since 1 + 577 + 4 + 9 + 2 + 73 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 100641024 + 57108249 = 10032^2 + 7557^2 .

It is not a de Polignac number, because 157749273 - 2¹⁰ = 157748249 is a prime.

It is not an unprimeable number, because it can be changed into a prime (157749223) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 14253 + ... + 22773.

It is an arithmetic number, because the mean of its divisors is an integer number (7367269).

Almost surely, 2^157749273 is an apocalyptic number.

It is an amenable number.

157749273 is a deficient number, since it is larger than the sum of its proper divisors (107472411).

157749273 is a wasteful number, since it uses less digits than its factorization.

157749273 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8566 (or 8552 counting only the distinct ones).

The product of its digits is 370440, while the sum is 45.

The square root of 157749273 is about 12559.8277456341. The cubic root of 157749273 is about 540.3259040919.

The spelling of 157749273 in words is "one hundred fifty-seven million, seven hundred forty-nine thousand, two hundred seventy-three".