149940891 has 12 divisors (see below), whose sum is σ = 217039680. Its totient is φ = 99749040.

The previous prime is 149940851. The next prime is 149940907. The reversal of 149940891 is 198049941.

It is not a de Polignac number, because 149940891 - 2⁶ = 149940827 is a prime.

It is not an unprimeable number, because it can be changed into a prime (149940821) 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, 13080 + ... + 21701.

It is an arithmetic number, because the mean of its divisors is an integer number (18086640).

Almost surely, 2^149940891 is an apocalyptic number.

149940891 is a deficient number, since it is larger than the sum of its proper divisors (67098789).

149940891 is a wasteful number, since it uses less digits than its factorization.

149940891 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 35266 (or 35263 counting only the distinct ones).

The product of its (nonzero) digits is 93312, while the sum is 45.

The square root of 149940891 is about 12245.0353613209. The cubic root of 149940891 is about 531.2594835493.

The spelling of 149940891 in words is "one hundred forty-nine million, nine hundred forty thousand, eight hundred ninety-one".