91061783 has 2 divisors, whose sum is σ = 91061784. Its totient is φ = 91061782.

The previous prime is 91061771. The next prime is 91061821. The reversal of 91061783 is 38716019.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 91061783 - 2⁴ = 91061767 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (91061713) 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, 45530891 + 45530892.

It is an arithmetic number, because the mean of its divisors is an integer number (45530892).

Almost surely, 2^91061783 is an apocalyptic number.

91061783 is a deficient number, since it is larger than the sum of its proper divisors (1).

91061783 is an equidigital number, since it uses as much as digits as its factorization.

91061783 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 9072, while the sum is 35.

The square root of 91061783 is about 9542.6297738097. The cubic root of 91061783 is about 449.8959150217.

The spelling of 91061783 in words is "ninety-one million, sixty-one thousand, seven hundred eighty-three".