136865461 has 2 divisors, whose sum is σ = 136865462. Its totient is φ = 136865460.

The previous prime is 136865459. The next prime is 136865537. The reversal of 136865461 is 164568631.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 107640625 + 29224836 = 10375^2 + 5406^2 .

It is an emirp because it is prime and its reverse (164568631) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 136865461 - 2¹ = 136865459 is a prime.

Together with 136865459, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (136865401) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 68432730 + 68432731.

It is an arithmetic number, because the mean of its divisors is an integer number (68432731).

Almost surely, 2^136865461 is an apocalyptic number.

It is an amenable number.

136865461 is a deficient number, since it is larger than the sum of its proper divisors (1).

136865461 is an equidigital number, since it uses as much as digits as its factorization.

136865461 is an evil number, because the sum of its binary digits is even.

The product of its digits is 103680, while the sum is 40.

The square root of 136865461 is about 11698.9512777855. The cubic root of 136865461 is about 515.3448671969.

The spelling of 136865461 in words is "one hundred thirty-six million, eight hundred sixty-five thousand, four hundred sixty-one".