136881671 has 12 divisors (see below), whose sum is σ = 151736592. Its totient is φ = 123222528.

The previous prime is 136881659. The next prime is 136881673. The reversal of 136881671 is 176188631.

It is not a de Polignac number, because 136881671 - 2⁶ = 136881607 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (136881673) 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, 3650 + ... + 16943.

It is an arithmetic number, because the mean of its divisors is an integer number (12644716).

Almost surely, 2^136881671 is an apocalyptic number.

136881671 is a deficient number, since it is larger than the sum of its proper divisors (14854921).

136881671 is a wasteful number, since it uses less digits than its factorization.

136881671 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20650 (or 20633 counting only the distinct ones).

The product of its digits is 48384, while the sum is 41.

The square root of 136881671 is about 11699.6440544146. The cubic root of 136881671 is about 515.3652117758.

The spelling of 136881671 in words is "one hundred thirty-six million, eight hundred eighty-one thousand, six hundred seventy-one".