158323861 has 2 divisors, whose sum is σ = 158323862. Its totient is φ = 158323860.

The previous prime is 158323843. The next prime is 158323901. The reversal of 158323861 is 168323851.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 140422500 + 17901361 = 11850^2 + 4231^2 .

It is a cyclic number.

It is not a de Polignac number, because 158323861 - 2⁵ = 158323829 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 158323861.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (158323811) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 79161930 + 79161931.

It is an arithmetic number, because the mean of its divisors is an integer number (79161931).

Almost surely, 2^158323861 is an apocalyptic number.

It is an amenable number.

158323861 is a deficient number, since it is larger than the sum of its proper divisors (1).

158323861 is an equidigital number, since it uses as much as digits as its factorization.

158323861 is an evil number, because the sum of its binary digits is even.

The product of its digits is 34560, while the sum is 37.

The square root of 158323861 is about 12582.6809941284. The cubic root of 158323861 is about 540.9811392183.

The spelling of 158323861 in words is "one hundred fifty-eight million, three hundred twenty-three thousand, eight hundred sixty-one".