91696648 has 8 divisors (see below), whose sum is σ = 171931230. Its totient is φ = 45848320.

The previous prime is 91696639. The next prime is 91696651. The reversal of 91696648 is 84669619.

It can be written as a sum of positive squares in only one way, i.e., 84309124 + 7387524 = 9182^2 + 2718^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is an unprimeable number.

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 as a sum of consecutive naturals, namely, 5731033 + ... + 5731048.

Almost surely, 2^91696648 is an apocalyptic number.

91696648 is the 5119-th centered heptagonal number.

It is an amenable number.

91696648 is a deficient number, since it is larger than the sum of its proper divisors (80234582).

91696648 is a wasteful number, since it uses less digits than its factorization.

91696648 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11462087 (or 11462083 counting only the distinct ones).

The product of its digits is 559872, while the sum is 49.

The square root of 91696648 is about 9575.8366736281. The cubic root of 91696648 is about 450.9390235210.

The spelling of 91696648 in words is "ninety-one million, six hundred ninety-six thousand, six hundred forty-eight".