91961743 has 2 divisors, whose sum is σ = 91961744. Its totient is φ = 91961742.

The previous prime is 91961719. The next prime is 91961777. The reversal of 91961743 is 34716919.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 91961743 - 2⁵ = 91961711 is a prime.

It is a super-3 number, since 3×91961743³ (a number of 25 digits) contains 333 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 91961696 and 91961705.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (91961713) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 45980871 + 45980872.

It is an arithmetic number, because the mean of its divisors is an integer number (45980872).

Almost surely, 2^91961743 is an apocalyptic number.

91961743 is a deficient number, since it is larger than the sum of its proper divisors (1).

91961743 is an equidigital number, since it uses as much as digits as its factorization.

91961743 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 40824, while the sum is 40.

The square root of 91961743 is about 9589.6685552734. The cubic root of 91961743 is about 451.3731603166.

The spelling of 91961743 in words is "ninety-one million, nine hundred sixty-one thousand, seven hundred forty-three".