91287052 has 12 divisors (see below), whose sum is σ = 161677656. Its totient is φ = 45093440.

The previous prime is 91287047. The next prime is 91287061. The reversal of 91287052 is 25078219.

It is a junction number, because it is equal to n+sod(n) for n = 91286999 and 91287017.

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 3 ways as a sum of consecutive naturals, for example, 137149 + ... + 137812.

It is an arithmetic number, because the mean of its divisors is an integer number (13473138).

Almost surely, 2^91287052 is an apocalyptic number.

It is an amenable number.

91287052 is a deficient number, since it is larger than the sum of its proper divisors (70390604).

91287052 is a wasteful number, since it uses less digits than its factorization.

91287052 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 275048 (or 275046 counting only the distinct ones).

The product of its (nonzero) digits is 10080, while the sum is 34.

The square root of 91287052 is about 9554.4257807573. The cubic root of 91287052 is about 450.2665942933.

The spelling of 91287052 in words is "ninety-one million, two hundred eighty-seven thousand, fifty-two".