1707868157 has 2 divisors, whose sum is σ = 1707868158. Its totient is φ = 1707868156.

The previous prime is 1707868139. The next prime is 1707868159. The reversal of 1707868157 is 7518687071.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1063672996 + 644195161 = 32614^2 + 25381^2 .

It is a cyclic number.

It is not a de Polignac number, because 1707868157 - 2¹⁸ = 1707606013 is a prime.

Together with 1707868159, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1707868159) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 853934078 + 853934079.

It is an arithmetic number, because the mean of its divisors is an integer number (853934079).

Almost surely, 2^1707868157 is an apocalyptic number.

It is an amenable number.

1707868157 is a deficient number, since it is larger than the sum of its proper divisors (1).

1707868157 is an equidigital number, since it uses as much as digits as its factorization.

1707868157 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 658560, while the sum is 50.

The square root of 1707868157 is about 41326.3615262704. The cubic root of 1707868157 is about 1195.3216356157.

The spelling of 1707868157 in words is "one billion, seven hundred seven million, eight hundred sixty-eight thousand, one hundred fifty-seven".