136401791 has 2 divisors, whose sum is σ = 136401792. Its totient is φ = 136401790.

The previous prime is 136401787. The next prime is 136401833. The reversal of 136401791 is 197104631.

136401791 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 136401791 - 2² = 136401787 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (136401491) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 68200895 + 68200896.

It is an arithmetic number, because the mean of its divisors is an integer number (68200896).

Almost surely, 2^136401791 is an apocalyptic number.

136401791 is a deficient number, since it is larger than the sum of its proper divisors (1).

136401791 is an equidigital number, since it uses as much as digits as its factorization.

136401791 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 4536, while the sum is 32.

The square root of 136401791 is about 11679.1177320892. The cubic root of 136401791 is about 514.7622505201.

The spelling of 136401791 in words is "one hundred thirty-six million, four hundred one thousand, seven hundred ninety-one".