157767493 has 8 divisors (see below), whose sum is σ = 171656408. Its totient is φ = 144129024.

The previous prime is 157767461. The next prime is 157767521. The reversal of 157767493 is 394767751.

It can be written as a sum of positive squares in 4 ways, for example, as 3560769 + 154206724 = 1887^2 + 12418^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 157767493 - 2⁵ = 157767461 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (157767433) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 61296 + ... + 63817.

It is an arithmetic number, because the mean of its divisors is an integer number (21457051).

Almost surely, 2^157767493 is an apocalyptic number.

157767493 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

It is an amenable number.

157767493 is a deficient number, since it is larger than the sum of its proper divisors (13888915).

157767493 is a wasteful number, since it uses less digits than its factorization.

157767493 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 125223.

The product of its digits is 1111320, while the sum is 49.

The square root of 157767493 is about 12560.5530531104. The cubic root of 157767493 is about 540.3467057915.

The spelling of 157767493 in words is "one hundred fifty-seven million, seven hundred sixty-seven thousand, four hundred ninety-three".