61365791 has 2 divisors, whose sum is σ = 61365792. Its totient is φ = 61365790.

The previous prime is 61365779. The next prime is 61365847. The reversal of 61365791 is 19756316.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 61365791 - 2⁶ = 61365727 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (61365191) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 30682895 + 30682896.

It is an arithmetic number, because the mean of its divisors is an integer number (30682896).

Almost surely, 2^61365791 is an apocalyptic number.

61365791 is a deficient number, since it is larger than the sum of its proper divisors (1).

61365791 is an equidigital number, since it uses as much as digits as its factorization.

61365791 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 34020, while the sum is 38.

The square root of 61365791 is about 7833.6320439500. The cubic root of 61365791 is about 394.4350005865.

The spelling of 61365791 in words is "sixty-one million, three hundred sixty-five thousand, seven hundred ninety-one".