91603764 has 48 divisors (see below), whose sum is σ = 271420800. Its totient is φ = 26172288.

The previous prime is 91603763. The next prime is 91603777. The reversal of 91603764 is 46730619.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (91603763) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 59829 + ... + 61340.

It is an arithmetic number, because the mean of its divisors is an integer number (5654600).

Almost surely, 2^91603764 is an apocalyptic number.

It is an amenable number.

91603764 is an abundant number, since it is smaller than the sum of its proper divisors (179817036).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

91603764 is a wasteful number, since it uses less digits than its factorization.

91603764 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 121189 (or 121181 counting only the distinct ones).

The product of its (nonzero) digits is 27216, while the sum is 36.

The square root of 91603764 is about 9570.9855291919. The cubic root of 91603764 is about 450.7867127165.

The spelling of 91603764 in words is "ninety-one million, six hundred three thousand, seven hundred sixty-four".