168157417 has 2 divisors, whose sum is σ = 168157418. Its totient is φ = 168157416.

The previous prime is 168157369. The next prime is 168157453. The reversal of 168157417 is 714751861.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 151314601 + 16842816 = 12301^2 + 4104^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-168157417 is a prime.

It is a super-2 number, since 2×168157417² = 56553833784223778, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 168157417.

It is not a weakly prime, because it can be changed into another prime (168154417) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 84078708 + 84078709.

It is an arithmetic number, because the mean of its divisors is an integer number (84078709).

Almost surely, 2^168157417 is an apocalyptic number.

It is an amenable number.

168157417 is a deficient number, since it is larger than the sum of its proper divisors (1).

168157417 is an equidigital number, since it uses as much as digits as its factorization.

168157417 is an evil number, because the sum of its binary digits is even.

The product of its digits is 47040, while the sum is 40.

The square root of 168157417 is about 12967.5524676016. The cubic root of 168157417 is about 551.9571233675.

The spelling of 168157417 in words is "one hundred sixty-eight million, one hundred fifty-seven thousand, four hundred seventeen".