151389891 has 20 divisors (see below), whose sum is σ = 238055400. Its totient is φ = 95613696.

The previous prime is 151389881. The next prime is 151389893. The reversal of 151389891 is 198983151.

It is not a de Polignac number, because 151389891 - 2⁵ = 151389859 is a prime.

It is not an unprimeable number, because it can be changed into a prime (151389893) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 47646 + ... + 50723.

It is an arithmetic number, because the mean of its divisors is an integer number (11902770).

Almost surely, 2^151389891 is an apocalyptic number.

151389891 is a deficient number, since it is larger than the sum of its proper divisors (86665509).

151389891 is an equidigital number, since it uses as much as digits as its factorization.

151389891 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 98400 (or 98391 counting only the distinct ones).

The product of its digits is 77760, while the sum is 45.

The square root of 151389891 is about 12304.0599397110. The cubic root of 151389891 is about 532.9653302053.

The spelling of 151389891 in words is "one hundred fifty-one million, three hundred eighty-nine thousand, eight hundred ninety-one".