149492691 has 12 divisors (see below), whose sum is σ = 221770432. Its totient is φ = 96968016.

The previous prime is 149492689. The next prime is 149492699. The reversal of 149492691 is 196294941.

149492691 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 149492691 - 2¹ = 149492689 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (149492699) 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, 224131 + ... + 224796.

Almost surely, 2^149492691 is an apocalyptic number.

149492691 is a deficient number, since it is larger than the sum of its proper divisors (72277741).

149492691 is a wasteful number, since it uses less digits than its factorization.

149492691 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 448970 (or 448967 counting only the distinct ones).

The product of its digits is 139968, while the sum is 45.

The square root of 149492691 is about 12226.7203697476. The cubic root of 149492691 is about 530.7296121996.

The spelling of 149492691 in words is "one hundred forty-nine million, four hundred ninety-two thousand, six hundred ninety-one".