136687825 has 6 divisors (see below), whose sum is σ = 169492934. Its totient is φ = 109350240.

The previous prime is 136687799. The next prime is 136687829. The reversal of 136687825 is 528786631.

It can be written as a sum of positive squares in 3 ways, for example, as 242064 + 136445761 = 492^2 + 11681^2 .

It is a de Polignac number, because none of the positive numbers 2^k-136687825 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (136687829) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 2733732 + ... + 2733781.

Almost surely, 2^136687825 is an apocalyptic number.

It is an amenable number.

136687825 is a deficient number, since it is larger than the sum of its proper divisors (32805109).

136687825 is an equidigital number, since it uses as much as digits as its factorization.

136687825 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5467523 (or 5467518 counting only the distinct ones).

The product of its digits is 483840, while the sum is 46.

The square root of 136687825 is about 11691.3568502548. The cubic root of 136687825 is about 515.1218174144.

The spelling of 136687825 in words is "one hundred thirty-six million, six hundred eighty-seven thousand, eight hundred twenty-five".