157694017 has 4 divisors (see below), whose sum is σ = 169824340. Its totient is φ = 145563696.

The previous prime is 157693951. The next prime is 157694041. The reversal of 157694017 is 710496751.

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 44675856 + 113018161 = 6684^2 + 10631^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-157694017 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (157698017) 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 3 ways as a sum of consecutive naturals, for example, 6065142 + ... + 6065167.

It is an arithmetic number, because the mean of its divisors is an integer number (42456085).

Almost surely, 2^157694017 is an apocalyptic number.

It is an amenable number.

157694017 is a deficient number, since it is larger than the sum of its proper divisors (12130323).

157694017 is a wasteful number, since it uses less digits than its factorization.

157694017 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12130322.

The product of its (nonzero) digits is 52920, while the sum is 40.

The square root of 157694017 is about 12557.6278412764. The cubic root of 157694017 is about 540.2628087460.

The spelling of 157694017 in words is "one hundred fifty-seven million, six hundred ninety-four thousand, seventeen".