149991227 has 2 divisors, whose sum is σ = 149991228. Its totient is φ = 149991226.

The previous prime is 149991199. The next prime is 149991251. The reversal of 149991227 is 722199941.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 149991227 - 2²² = 145796923 is a prime.

It is not a weakly prime, because it can be changed into another prime (149991427) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 74995613 + 74995614.

It is an arithmetic number, because the mean of its divisors is an integer number (74995614).

Almost surely, 2^149991227 is an apocalyptic number.

149991227 is a deficient number, since it is larger than the sum of its proper divisors (1).

149991227 is an equidigital number, since it uses as much as digits as its factorization.

149991227 is an evil number, because the sum of its binary digits is even.

The product of its digits is 81648, while the sum is 44.

The square root of 149991227 is about 12247.0905524537. The cubic root of 149991227 is about 531.3189258298.

The spelling of 149991227 in words is "one hundred forty-nine million, nine hundred ninety-one thousand, two hundred twenty-seven".