136985499 has 20 divisors (see below), whose sum is σ = 233866864. Its totient is φ = 78277104.

The previous prime is 136985491. The next prime is 136985503. The reversal of 136985499 is 994589631.

136985499 is a `hidden beast` number, since 1 + 3 + 6 + 98 + 549 + 9 = 666.

136985499 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 136985499 - 2³ = 136985491 is a prime.

It is not an unprimeable number, because it can be changed into a prime (136985491) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 120232 + ... + 121365.

Almost surely, 2^136985499 is an apocalyptic number.

136985499 is a deficient number, since it is larger than the sum of its proper divisors (96881365).

136985499 is an equidigital number, since it uses as much as digits as its factorization.

136985499 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 241616 (or 241607 counting only the distinct ones).

The product of its digits is 2099520, while the sum is 54.

The square root of 136985499 is about 11704.0804423073. The cubic root of 136985499 is about 515.4954844295.

It can be divided in two parts, 1369 and 85499, that added together give a palindrome (86868).

The spelling of 136985499 in words is "one hundred thirty-six million, nine hundred eighty-five thousand, four hundred ninety-nine".