149991249 has 12 divisors (see below), whose sum is σ = 201119568. Its totient is φ = 99431640.

The previous prime is 149991227. The next prime is 149991251. The reversal of 149991249 is 942199941.

It is a happy number.

149991249 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 149991249 - 2⁸ = 149990993 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 149991198 and 149991207.

It is not an unprimeable number, because it can be changed into a prime (149991649) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 133002 + ... + 134124.

It is an arithmetic number, because the mean of its divisors is an integer number (16759964).

Almost surely, 2^149991249 is an apocalyptic number.

It is an amenable number.

149991249 is a deficient number, since it is larger than the sum of its proper divisors (51128319).

149991249 is an equidigital number, since it uses as much as digits as its factorization.

149991249 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1548 (or 1337 counting only the distinct ones).

The product of its digits is 209952, while the sum is 48.

The square root of 149991249 is about 12247.0914506261. The cubic root of 149991249 is about 531.3189518069.

The spelling of 149991249 in words is "one hundred forty-nine million, nine hundred ninety-one thousand, two hundred forty-nine".