157170617 has 2 divisors, whose sum is σ = 157170618. Its totient is φ = 157170616.

The previous prime is 157170613. The next prime is 157170619. The reversal of 157170617 is 716071751.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 157151296 + 19321 = 12536^2 + 139^2 .

It is a cyclic number.

It is not a de Polignac number, because 157170617 - 2² = 157170613 is a prime.

Together with 157170619, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (157170613) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 78585308 + 78585309.

It is an arithmetic number, because the mean of its divisors is an integer number (78585309).

Almost surely, 2^157170617 is an apocalyptic number.

It is an amenable number.

157170617 is a deficient number, since it is larger than the sum of its proper divisors (1).

157170617 is an equidigital number, since it uses as much as digits as its factorization.

157170617 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 10290, while the sum is 35.

The square root of 157170617 is about 12536.7705969281. The cubic root of 157170617 is about 539.6644199854.

The spelling of 157170617 in words is "one hundred fifty-seven million, one hundred seventy thousand, six hundred seventeen".