149981111 has 6 divisors (see below), whose sum is σ = 174467880. Its totient is φ = 128555196.

The previous prime is 149981107. The next prime is 149981129. The reversal of 149981111 is 111189941.

It is not a de Polignac number, because 149981111 - 2² = 149981107 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 (149981141) 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, 1530371 + ... + 1530468.

It is an arithmetic number, because the mean of its divisors is an integer number (29077980).

Almost surely, 2^149981111 is an apocalyptic number.

149981111 is a deficient number, since it is larger than the sum of its proper divisors (24486769).

149981111 is an equidigital number, since it uses as much as digits as its factorization.

149981111 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3060853 (or 3060846 counting only the distinct ones).

The product of its digits is 2592, while the sum is 35.

The square root of 149981111 is about 12246.6775494417. The cubic root of 149981111 is about 531.3069808132.

The spelling of 149981111 in words is "one hundred forty-nine million, nine hundred eighty-one thousand, one hundred eleven".