91769983 has 2 divisors, whose sum is σ = 91769984. Its totient is φ = 91769982.

The previous prime is 91769963. The next prime is 91769987. The reversal of 91769983 is 38996719.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 91769983 - 2²¹ = 89672831 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 91769983.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (91769987) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 45884991 + 45884992.

It is an arithmetic number, because the mean of its divisors is an integer number (45884992).

Almost surely, 2^91769983 is an apocalyptic number.

91769983 is a deficient number, since it is larger than the sum of its proper divisors (1).

91769983 is an equidigital number, since it uses as much as digits as its factorization.

91769983 is an evil number, because the sum of its binary digits is even.

The product of its digits is 734832, while the sum is 52.

The square root of 91769983 is about 9579.6650776528. The cubic root of 91769983 is about 451.0592053090.

The spelling of 91769983 in words is "ninety-one million, seven hundred sixty-nine thousand, nine hundred eighty-three".