136477989 has 24 divisors (see below), whose sum is σ = 213183360. Its totient is φ = 83806848.

The previous prime is 136477963. The next prime is 136477993. The reversal of 136477989 is 989774631.

It is a happy number.

It is not a de Polignac number, because 136477989 - 2²¹ = 134380837 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (136477189) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 2299 + ... + 16680.

It is an arithmetic number, because the mean of its divisors is an integer number (8882640).

Almost surely, 2^136477989 is an apocalyptic number.

It is an amenable number.

136477989 is a deficient number, since it is larger than the sum of its proper divisors (76705371).

136477989 is a wasteful number, since it uses less digits than its factorization.

136477989 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19049 (or 19046 counting only the distinct ones).

The product of its digits is 2286144, while the sum is 54.

The square root of 136477989 is about 11682.3794237304. The cubic root of 136477989 is about 514.8580863888.

The spelling of 136477989 in words is "one hundred thirty-six million, four hundred seventy-seven thousand, nine hundred eighty-nine".