158713561 has 2 divisors, whose sum is σ = 158713562. Its totient is φ = 158713560.

The previous prime is 158713543. The next prime is 158713579. The reversal of 158713561 is 165317851.

It is a balanced prime because it is at equal distance from previous prime (158713543) and next prime (158713579).

It can be written as a sum of positive squares in only one way, i.e., 151659225 + 7054336 = 12315^2 + 2656^2 .

It is an emirp because it is prime and its reverse (165317851) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 158713561 - 2¹¹ = 158711513 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 158713561.

It is not a weakly prime, because it can be changed into another prime (158713531) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 79356780 + 79356781.

It is an arithmetic number, because the mean of its divisors is an integer number (79356781).

Almost surely, 2^158713561 is an apocalyptic number.

It is an amenable number.

158713561 is a deficient number, since it is larger than the sum of its proper divisors (1).

158713561 is an equidigital number, since it uses as much as digits as its factorization.

158713561 is an evil number, because the sum of its binary digits is even.

The product of its digits is 25200, while the sum is 37.

The square root of 158713561 is about 12598.1570477590. The cubic root of 158713561 is about 541.4246344122.

The spelling of 158713561 in words is "one hundred fifty-eight million, seven hundred thirteen thousand, five hundred sixty-one".