91253253 has 16 divisors (see below), whose sum is σ = 149749376. Its totient is φ = 48133440.

The previous prime is 91253251. The next prime is 91253269. The reversal of 91253253 is 35235219.

It is not a de Polignac number, because 91253253 - 2¹ = 91253251 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 91253253.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (91253251) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 166858 + ... + 167403.

It is an arithmetic number, because the mean of its divisors is an integer number (9359336).

Almost surely, 2^91253253 is an apocalyptic number.

It is an amenable number.

91253253 is a deficient number, since it is larger than the sum of its proper divisors (58496123).

91253253 is a wasteful number, since it uses less digits than its factorization.

91253253 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 334284.

The product of its digits is 8100, while the sum is 30.

The square root of 91253253 is about 9552.6568555559. The cubic root of 91253253 is about 450.2110170823.

The spelling of 91253253 in words is "ninety-one million, two hundred fifty-three thousand, two hundred fifty-three".