154688891 has 8 divisors (see below), whose sum is σ = 180549120. Its totient is φ = 129769128.

The previous prime is 154688887. The next prime is 154688893. The reversal of 154688891 is 198886451.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 154688891 - 2² = 154688887 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (154688893) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 234761 + ... + 235418.

It is an arithmetic number, because the mean of its divisors is an integer number (22568640).

Almost surely, 2^154688891 is an apocalyptic number.

154688891 is a deficient number, since it is larger than the sum of its proper divisors (25860229).

154688891 is an equidigital number, since it uses as much as digits as its factorization.

154688891 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 470233.

The product of its digits is 552960, while the sum is 50.

The square root of 154688891 is about 12437.3988840111. The cubic root of 154688891 is about 536.8089012981.

The spelling of 154688891 in words is "one hundred fifty-four million, six hundred eighty-eight thousand, eight hundred ninety-one".