154608891 has 4 divisors (see below), whose sum is σ = 206145192. Its totient is φ = 103072592.

The previous prime is 154608877. The next prime is 154608893. The reversal of 154608891 is 198806451.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 198806451 = 3 ⋅66268817.

It is a cyclic number.

It is not a de Polignac number, because 154608891 - 2⁵ = 154608859 is a prime.

It is not an unprimeable number, because it can be changed into a prime (154608893) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 25768146 + ... + 25768151.

It is an arithmetic number, because the mean of its divisors is an integer number (51536298).

Almost surely, 2^154608891 is an apocalyptic number.

154608891 is a deficient number, since it is larger than the sum of its proper divisors (51536301).

154608891 is an equidigital number, since it uses as much as digits as its factorization.

154608891 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 51536300.

The product of its (nonzero) digits is 69120, while the sum is 42.

The square root of 154608891 is about 12434.1823615387. The cubic root of 154608891 is about 536.7163453791.

The spelling of 154608891 in words is "one hundred fifty-four million, six hundred eight thousand, eight hundred ninety-one".