158989723 has 2 divisors, whose sum is σ = 158989724. Its totient is φ = 158989722.

The previous prime is 158989717. The next prime is 158989751. The reversal of 158989723 is 327989851.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-158989723 is a prime.

It is not a weakly prime, because it can be changed into another prime (158999723) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 79494861 + 79494862.

It is an arithmetic number, because the mean of its divisors is an integer number (79494862).

Almost surely, 2^158989723 is an apocalyptic number.

158989723 is a deficient number, since it is larger than the sum of its proper divisors (1).

158989723 is an equidigital number, since it uses as much as digits as its factorization.

158989723 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1088640, while the sum is 52.

The square root of 158989723 is about 12609.1126967761. The cubic root of 158989723 is about 541.7384791995.

The spelling of 158989723 in words is "one hundred fifty-eight million, nine hundred eighty-nine thousand, seven hundred twenty-three".