136622987 has 2 divisors, whose sum is σ = 136622988. Its totient is φ = 136622986.

The previous prime is 136622971. The next prime is 136623001. The reversal of 136622987 is 789226631.

It is a strong prime.

It is an emirp because it is prime and its reverse (789226631) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 136622987 - 2⁴ = 136622971 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (136622687) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 68311493 + 68311494.

It is an arithmetic number, because the mean of its divisors is an integer number (68311494).

Almost surely, 2^136622987 is an apocalyptic number.

136622987 is a deficient number, since it is larger than the sum of its proper divisors (1).

136622987 is an equidigital number, since it uses as much as digits as its factorization.

136622987 is an evil number, because the sum of its binary digits is even.

The product of its digits is 217728, while the sum is 44.

The square root of 136622987 is about 11688.5836182148. The cubic root of 136622987 is about 515.0403550242.

The spelling of 136622987 in words is "one hundred thirty-six million, six hundred twenty-two thousand, nine hundred eighty-seven".