158623901 has 2 divisors, whose sum is σ = 158623902. Its totient is φ = 158623900.

The previous prime is 158623897. The next prime is 158623903. The reversal of 158623901 is 109326851.

158623901 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 90231001 + 68392900 = 9499^2 + 8270^2 .

It is a cyclic number.

It is not a de Polignac number, because 158623901 - 2² = 158623897 is a prime.

Together with 158623903, 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 (158623903) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 79311950 + 79311951.

It is an arithmetic number, because the mean of its divisors is an integer number (79311951).

Almost surely, 2^158623901 is an apocalyptic number.

It is an amenable number.

158623901 is a deficient number, since it is larger than the sum of its proper divisors (1).

158623901 is an equidigital number, since it uses as much as digits as its factorization.

158623901 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 12960, while the sum is 35.

The square root of 158623901 is about 12594.5980880693. The cubic root of 158623901 is about 541.3226618682.

The spelling of 158623901 in words is "one hundred fifty-eight million, six hundred twenty-three thousand, nine hundred one".