149891764 has 12 divisors (see below), whose sum is σ = 286157088. Its totient is φ = 68132600.

The previous prime is 149891761. The next prime is 149891809. The reversal of 149891764 is 467198941.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (149891761) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1703272 + ... + 1703359.

It is an arithmetic number, because the mean of its divisors is an integer number (23846424).

Almost surely, 2^149891764 is an apocalyptic number.

It is an amenable number.

149891764 is a deficient number, since it is larger than the sum of its proper divisors (136265324).

149891764 is a wasteful number, since it uses less digits than its factorization.

149891764 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3406646 (or 3406644 counting only the distinct ones).

The product of its digits is 435456, while the sum is 49.

The square root of 149891764 is about 12243.0292003246. The cubic root of 149891764 is about 531.2014561595.

The spelling of 149891764 in words is "one hundred forty-nine million, eight hundred ninety-one thousand, seven hundred sixty-four".