91590663 has 8 divisors (see below), whose sum is σ = 122182128. Its totient is φ = 61029824.

The previous prime is 91590661. The next prime is 91590673. The reversal of 91590663 is 36609519.

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 91590663 - 2¹ = 91590661 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (91590661) 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, 595 + ... + 13547.

It is an arithmetic number, because the mean of its divisors is an integer number (15272766).

Almost surely, 2^91590663 is an apocalyptic number.

91590663 is a deficient number, since it is larger than the sum of its proper divisors (30591465).

91590663 is a wasteful number, since it uses less digits than its factorization.

91590663 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15313.

The product of its (nonzero) digits is 43740, while the sum is 39.

The square root of 91590663 is about 9570.3010924422. The cubic root of 91590663 is about 450.7652214661.

The spelling of 91590663 in words is "ninety-one million, five hundred ninety thousand, six hundred sixty-three".