149277681 has 16 divisors (see below), whose sum is σ = 252745600. Its totient is φ = 85301424.

The previous prime is 149277673. The next prime is 149277707. The reversal of 149277681 is 186772941.

It is a happy number.

It is not a de Polignac number, because 149277681 - 2³ = 149277673 is a prime.

It is a super-2 number, since 2×149277681² = 44567652089475522, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (149277631) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 394726 + ... + 395103.

It is an arithmetic number, because the mean of its divisors is an integer number (15796600).

Almost surely, 2^149277681 is an apocalyptic number.

It is an amenable number.

149277681 is a deficient number, since it is larger than the sum of its proper divisors (103467919).

149277681 is an equidigital number, since it uses as much as digits as its factorization.

149277681 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 789845 (or 789839 counting only the distinct ones).

The product of its digits is 169344, while the sum is 45.

The square root of 149277681 is about 12217.9245782580. The cubic root of 149277681 is about 530.4750469658.

The spelling of 149277681 in words is "one hundred forty-nine million, two hundred seventy-seven thousand, six hundred eighty-one".