158409823 has 16 divisors (see below), whose sum is σ = 186480000. Its totient is φ = 132662880.

The previous prime is 158409817. The next prime is 158409871. The reversal of 158409823 is 328904851.

158409823 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-158409823 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (158419823) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 104928 + ... + 106426.

It is an arithmetic number, because the mean of its divisors is an integer number (11655000).

Almost surely, 2^158409823 is an apocalyptic number.

158409823 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

158409823 is a deficient number, since it is larger than the sum of its proper divisors (28070177).

158409823 is a wasteful number, since it uses less digits than its factorization.

158409823 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2262.

The product of its (nonzero) digits is 69120, while the sum is 40.

The square root of 158409823 is about 12586.0964162841. The cubic root of 158409823 is about 541.0790301416.

The spelling of 158409823 in words is "one hundred fifty-eight million, four hundred nine thousand, eight hundred twenty-three".