91953521 has 8 divisors (see below), whose sum is σ = 105592800. Its totient is φ = 79194240.

The previous prime is 91953503. The next prime is 91953523. The reversal of 91953521 is 12535919.

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 91953521 - 2⁶ = 91953457 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (91953523) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 219776 + ... + 220193.

It is an arithmetic number, because the mean of its divisors is an integer number (13199100).

Almost surely, 2^91953521 is an apocalyptic number.

It is an amenable number.

91953521 is a deficient number, since it is larger than the sum of its proper divisors (13639279).

91953521 is a wasteful number, since it uses less digits than its factorization.

91953521 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 439999.

The product of its digits is 12150, while the sum is 35.

The square root of 91953521 is about 9589.2398551710. The cubic root of 91953521 is about 451.3597079808.

The spelling of 91953521 in words is "ninety-one million, nine hundred fifty-three thousand, five hundred twenty-one".