157713617 has 4 divisors (see below), whose sum is σ = 158530980. Its totient is φ = 156896256.

The previous prime is 157713601. The next prime is 157713643. The reversal of 157713617 is 716317751.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 716317751 = 2243 ⋅319357.

It can be written as a sum of positive squares in 2 ways, for example, as 28686736 + 129026881 = 5356^2 + 11359^2 .

It is a cyclic number.

It is not a de Polignac number, because 157713617 - 2⁴ = 157713601 is a prime.

It is a Duffinian number.

It is a zygodrome in base 12.

It is not an unprimeable number, because it can be changed into a prime (157713697) 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, 408392 + ... + 408777.

It is an arithmetic number, because the mean of its divisors is an integer number (39632745).

Almost surely, 2^157713617 is an apocalyptic number.

It is an amenable number.

157713617 is a deficient number, since it is larger than the sum of its proper divisors (817363).

157713617 is an equidigital number, since it uses as much as digits as its factorization.

157713617 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 817362.

The product of its digits is 30870, while the sum is 38.

The square root of 157713617 is about 12558.4082191972. The cubic root of 157713617 is about 540.2851911474.

The spelling of 157713617 in words is "one hundred fifty-seven million, seven hundred thirteen thousand, six hundred seventeen".