91973376 has 216 divisors, whose sum is σ = 306109440. Its totient is φ = 26265600.

The previous prime is 91973353. The next prime is 91973393. The reversal of 91973376 is 67337919.

It is a Smith number, since the sum of its digits (45) coincides with the sum of the digits of its prime factors.

Its product of digits (214326) is a multiple of the sum of its prime factors (243).

It is a congruent number.

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 in 23 ways as a sum of consecutive naturals, for example, 481441 + ... + 481631.

Almost surely, 2^91973376 is an apocalyptic number.

91973376 is a gapful number since it is divisible by the number (96) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 91973376, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (153054720).

91973376 is an abundant number, since it is smaller than the sum of its proper divisors (214136064).

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

91973376 is a wasteful number, since it uses less digits than its factorization.

91973376 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 243 (or 226 counting only the distinct ones).

The product of its digits is 214326, while the sum is 45.

The square root of 91973376 is about 9590.2750742614. The cubic root of 91973376 is about 451.3921921531.

The spelling of 91973376 in words is "ninety-one million, nine hundred seventy-three thousand, three hundred seventy-six".