149891147 has 6 divisors (see below), whose sum is σ = 174363228. Its totient is φ = 128478084.

The previous prime is 149891141. The next prime is 149891167. The reversal of 149891147 is 741198941.

It is a happy number.

149891147 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 149891147 - 2⁸ = 149890891 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 149891098 and 149891107.

It is not an unprimeable number, because it can be changed into a prime (149891141) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1529453 + ... + 1529550.

It is an arithmetic number, because the mean of its divisors is an integer number (29060538).

Almost surely, 2^149891147 is an apocalyptic number.

149891147 is a deficient number, since it is larger than the sum of its proper divisors (24472081).

149891147 is an equidigital number, since it uses as much as digits as its factorization.

149891147 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3059017 (or 3059010 counting only the distinct ones).

The product of its digits is 72576, while the sum is 44.

The square root of 149891147 is about 12243.0040022864. The cubic root of 149891147 is about 531.2007272964.

The spelling of 149891147 in words is "one hundred forty-nine million, eight hundred ninety-one thousand, one hundred forty-seven".