91723328 has 14 divisors (see below), whose sum is σ = 182013606. Its totient is φ = 45861632.

The previous prime is 91723309. The next prime is 91723339. The reversal of 91723328 is 82332719.

It can be written as a sum of positive squares in only one way, i.e., 89264704 + 2458624 = 9448^2 + 1568^2 .

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, 716525 + ... + 716652.

Almost surely, 2^91723328 is an apocalyptic number.

It is an amenable number.

91723328 is a deficient number, since it is larger than the sum of its proper divisors (90290278).

91723328 is a wasteful number, since it uses less digits than its factorization.

91723328 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1433189 (or 1433179 counting only the distinct ones).

The product of its digits is 18144, while the sum is 35.

The square root of 91723328 is about 9577.2296620683. The cubic root of 91723328 is about 450.9827542598.

The spelling of 91723328 in words is "ninety-one million, seven hundred twenty-three thousand, three hundred twenty-eight".