149491667 has 4 divisors (see below), whose sum is σ = 160991040. Its totient is φ = 137992296.

The previous prime is 149491649. The next prime is 149491709. The reversal of 149491667 is 766194941.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 766194941 = 43 ⋅17818487.

It is not a de Polignac number, because 149491667 - 2¹⁰ = 149490643 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (149491267) 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, 5749667 + ... + 5749692.

It is an arithmetic number, because the mean of its divisors is an integer number (40247760).

Almost surely, 2^149491667 is an apocalyptic number.

149491667 is a deficient number, since it is larger than the sum of its proper divisors (11499373).

149491667 is a wasteful number, since it uses less digits than its factorization.

149491667 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11499372.

The product of its digits is 326592, while the sum is 47.

The square root of 149491667 is about 12226.6784941782. The cubic root of 149491667 is about 530.7284003937.

The spelling of 149491667 in words is "one hundred forty-nine million, four hundred ninety-one thousand, six hundred sixty-seven".