136172461 has 2 divisors, whose sum is σ = 136172462. Its totient is φ = 136172460.

The previous prime is 136172459. The next prime is 136172473. The reversal of 136172461 is 164271631.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 135373225 + 799236 = 11635^2 + 894^2 .

It is a cyclic number.

It is not a de Polignac number, because 136172461 - 2¹ = 136172459 is a prime.

Together with 136172459, 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 (136172161) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 68086230 + 68086231.

It is an arithmetic number, because the mean of its divisors is an integer number (68086231).

Almost surely, 2^136172461 is an apocalyptic number.

It is an amenable number.

136172461 is a deficient number, since it is larger than the sum of its proper divisors (1).

136172461 is an equidigital number, since it uses as much as digits as its factorization.

136172461 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 6048, while the sum is 31.

The square root of 136172461 is about 11669.2956514093. The cubic root of 136172461 is about 514.4736017015.

The spelling of 136172461 in words is "one hundred thirty-six million, one hundred seventy-two thousand, four hundred sixty-one".