158878891 has 2 divisors, whose sum is σ = 158878892. Its totient is φ = 158878890.

The previous prime is 158878883. The next prime is 158878903. The reversal of 158878891 is 198878851.

158878891 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It is an emirp because it is prime and its reverse (198878851) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 158878891 - 2³ = 158878883 is a prime.

It is not a weakly prime, because it can be changed into another prime (158878801) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 79439445 + 79439446.

It is an arithmetic number, because the mean of its divisors is an integer number (79439446).

Almost surely, 2^158878891 is an apocalyptic number.

158878891 is a deficient number, since it is larger than the sum of its proper divisors (1).

158878891 is an equidigital number, since it uses as much as digits as its factorization.

158878891 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1290240, while the sum is 55.

The square root of 158878891 is about 12604.7170138802. The cubic root of 158878891 is about 541.6125676726.

The spelling of 158878891 in words is "one hundred fifty-eight million, eight hundred seventy-eight thousand, eight hundred ninety-one".