136687829 has 2 divisors, whose sum is σ = 136687830. Its totient is φ = 136687828.

The previous prime is 136687799. The next prime is 136687849. The reversal of 136687829 is 928786631.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 130005604 + 6682225 = 11402^2 + 2585^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-136687829 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (136687849) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 68343914 + 68343915.

It is an arithmetic number, because the mean of its divisors is an integer number (68343915).

Almost surely, 2^136687829 is an apocalyptic number.

It is an amenable number.

136687829 is a deficient number, since it is larger than the sum of its proper divisors (1).

136687829 is an equidigital number, since it uses as much as digits as its factorization.

136687829 is an evil number, because the sum of its binary digits is even.

The product of its digits is 870912, while the sum is 50.

The square root of 136687829 is about 11691.3570213213. The cubic root of 136687829 is about 515.1218224392.

The spelling of 136687829 in words is "one hundred thirty-six million, six hundred eighty-seven thousand, eight hundred twenty-nine".