158961701 has 2 divisors, whose sum is σ = 158961702. Its totient is φ = 158961700.

The previous prime is 158961659. The next prime is 158961827. The reversal of 158961701 is 107169851.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 104571076 + 54390625 = 10226^2 + 7375^2 .

It is an emirp because it is prime and its reverse (107169851) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 158961701 - 2⁶ = 158961637 is a prime.

It is a Chen prime.

It is equal to p_8919425 and since 158961701 and 8919425 have the same sum of digits, it is a Honaker prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (158960701) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 79480850 + 79480851.

It is an arithmetic number, because the mean of its divisors is an integer number (79480851).

Almost surely, 2^158961701 is an apocalyptic number.

It is an amenable number.

158961701 is a deficient number, since it is larger than the sum of its proper divisors (1).

158961701 is an equidigital number, since it uses as much as digits as its factorization.

158961701 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 15120, while the sum is 38.

The square root of 158961701 is about 12608.0014673222. The cubic root of 158961701 is about 541.7066501241.

The spelling of 158961701 in words is "one hundred fifty-eight million, nine hundred sixty-one thousand, seven hundred one".