91992553 has 8 divisors (see below), whose sum is σ = 95275080. Its totient is φ = 88717440.

The previous prime is 91992539. The next prime is 91992581. The reversal of 91992553 is 35529919.

It can be written as a sum of positive squares in 4 ways, for example, as 11854249 + 80138304 = 3443^2 + 8952^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 91992553 - 2⁵ = 91992521 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (91992503) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 38901 + ... + 41197.

It is an arithmetic number, because the mean of its divisors is an integer number (11909385).

Almost surely, 2^91992553 is an apocalyptic number.

It is an amenable number.

91992553 is a deficient number, since it is larger than the sum of its proper divisors (3282527).

91992553 is a wasteful number, since it uses less digits than its factorization.

91992553 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3707.

The product of its digits is 109350, while the sum is 43.

The square root of 91992553 is about 9591.2748370589. The cubic root of 91992553 is about 451.4235626318.

The spelling of 91992553 in words is "ninety-one million, nine hundred ninety-two thousand, five hundred fifty-three".