136186489 has 4 divisors (see below), whose sum is σ = 136212340. Its totient is φ = 136160640.

The previous prime is 136186469. The next prime is 136186493. The reversal of 136186489 is 984681631.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 127306089 + 8880400 = 11283^2 + 2980^2 .

It is a cyclic number.

It is not a de Polignac number, because 136186489 - 2¹³ = 136178297 is a prime.

It is a super-2 number, since 2×136186489² = 37093519572294242, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (136186409) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1872 + ... + 16609.

It is an arithmetic number, because the mean of its divisors is an integer number (34053085).

Almost surely, 2^136186489 is an apocalyptic number.

It is an amenable number.

136186489 is a deficient number, since it is larger than the sum of its proper divisors (25851).

136186489 is an equidigital number, since it uses as much as digits as its factorization.

136186489 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25850.

The product of its digits is 248832, while the sum is 46.

The square root of 136186489 is about 11669.8967004854. The cubic root of 136186489 is about 514.4912675051.

The spelling of 136186489 in words is "one hundred thirty-six million, one hundred eighty-six thousand, four hundred eighty-nine".