91905763 has 4 divisors (see below), whose sum is σ = 93639888. Its totient is φ = 90171640.

The previous prime is 91905721. The next prime is 91905797. The reversal of 91905763 is 36750919.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 36750919 = 3931 ⋅9349.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-91905763 is a prime.

It is a super-2 number, since 2×91905763² = 16893338545224338, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (91905713) 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 in 3 ways as a sum of consecutive naturals, for example, 866983 + ... + 867088.

It is an arithmetic number, because the mean of its divisors is an integer number (23409972).

Almost surely, 2^91905763 is an apocalyptic number.

91905763 is a deficient number, since it is larger than the sum of its proper divisors (1734125).

91905763 is a wasteful number, since it uses less digits than its factorization.

91905763 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1734124.

The product of its (nonzero) digits is 51030, while the sum is 40.

The square root of 91905763 is about 9586.7493447988. The cubic root of 91905763 is about 451.2815533884.

The spelling of 91905763 in words is "ninety-one million, nine hundred five thousand, seven hundred sixty-three".