149831111 has 4 divisors (see below), whose sum is σ = 150607632. Its totient is φ = 149054592.

The previous prime is 149831089. The next prime is 149831141. The reversal of 149831111 is 111138941.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 149831111 - 2²⁶ = 82722247 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (149831141) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 387971 + ... + 388356.

It is an arithmetic number, because the mean of its divisors is an integer number (37651908).

Almost surely, 2^149831111 is an apocalyptic number.

149831111 is a deficient number, since it is larger than the sum of its proper divisors (776521).

149831111 is an equidigital number, since it uses as much as digits as its factorization.

149831111 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 776520.

The product of its digits is 864, while the sum is 29.

The square root of 149831111 is about 12240.5519074918. The cubic root of 149831111 is about 531.1297970997.

The spelling of 149831111 in words is "one hundred forty-nine million, eight hundred thirty-one thousand, one hundred eleven".