91699776 has 315 divisors, whose sum is σ = 333725139. Its totient is φ = 24820992.

The previous prime is 91699771. The next prime is 91699787. The reversal of 91699776 is 67799619.

The square root of 91699776 is 9576.

It is a perfect power (a square), and thus also a powerful number.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is a nude number because it is divisible by every one of its digits.

It is not an unprimeable number, because it can be changed into a prime (91699771) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 44 ways as a sum of consecutive naturals, for example, 4826295 + ... + 4826313.

Almost surely, 2^91699776 is an apocalyptic number.

91699776 is a gapful number since it is divisible by the number (96) formed by its first and last digit.

91699776 is the 9576-th square number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 91699776

91699776 is an abundant number, since it is smaller than the sum of its proper divisors (242025363).

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

91699776 is a wasteful number, since it uses less digits than its factorization.

91699776 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 76 (or 31 counting only the distinct ones).

The product of its digits is 1285956, while the sum is 54.

The cubic root of 91699776 is about 450.9441510121.

Multiplying 91699776 by its product of digits (1285956), we get a square (117921877145856 = 10859184²).

The spelling of 91699776 in words is "ninety-one million, six hundred ninety-nine thousand, seven hundred seventy-six".