91863761 has 8 divisors (see below), whose sum is σ = 100341504. Its totient is φ = 83407120.

The previous prime is 91863749. The next prime is 91863791. The reversal of 91863761 is 16736819.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 91863761 - 2⁶ = 91863697 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (91863721) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4655 + ... + 14331.

It is an arithmetic number, because the mean of its divisors is an integer number (12542688).

Almost surely, 2^91863761 is an apocalyptic number.

It is an amenable number.

91863761 is a deficient number, since it is larger than the sum of its proper divisors (8477743).

91863761 is a wasteful number, since it uses less digits than its factorization.

91863761 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10551.

The product of its digits is 54432, while the sum is 41.

The square root of 91863761 is about 9584.5584666170. The cubic root of 91863761 is about 451.2127959444.

The spelling of 91863761 in words is "ninety-one million, eight hundred sixty-three thousand, seven hundred sixty-one".