157797393 has 8 divisors (see below), whose sum is σ = 226580928. Its totient is φ = 97106064.

The previous prime is 157797371. The next prime is 157797421. The reversal of 157797393 is 393797751.

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

It is not a de Polignac number, because 157797393 - 2⁵ = 157797361 is a prime.

It is not an unprimeable number, because it can be changed into a prime (157797313) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2023005 + ... + 2023082.

It is an arithmetic number, because the mean of its divisors is an integer number (28322616).

Almost surely, 2^157797393 is an apocalyptic number.

157797393 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

It is an amenable number.

157797393 is a deficient number, since it is larger than the sum of its proper divisors (68783535).

157797393 is a wasteful number, since it uses less digits than its factorization.

157797393 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4046103.

The product of its digits is 1250235, while the sum is 51.

The square root of 157797393 is about 12561.7432309373. The cubic root of 157797393 is about 540.3808390290.

The spelling of 157797393 in words is "one hundred fifty-seven million, seven hundred ninety-seven thousand, three hundred ninety-three".