91071253 has 12 divisors (see below), whose sum is σ = 114090060. Its totient is φ = 72055872.

The previous prime is 91071163. The next prime is 91071259. The reversal of 91071253 is 35217019.

It can be written as a sum of positive squares in 2 ways, for example, as 6853924 + 84217329 = 2618^2 + 9177^2 .

It is not a de Polignac number, because 91071253 - 2⁹ = 91070741 is a prime.

It is a super-3 number, since 3×91071253³ (a number of 25 digits) contains 333 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (91071259) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 70848 + ... + 72121.

It is an arithmetic number, because the mean of its divisors is an integer number (9507505).

Almost surely, 2^91071253 is an apocalyptic number.

It is an amenable number.

91071253 is a deficient number, since it is larger than the sum of its proper divisors (23018807).

91071253 is a wasteful number, since it uses less digits than its factorization.

91071253 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 142996 (or 142989 counting only the distinct ones).

The product of its (nonzero) digits is 1890, while the sum is 28.

The square root of 91071253 is about 9543.1259553670. The cubic root of 91071253 is about 449.9115101722.

The spelling of 91071253 in words is "ninety-one million, seventy-one thousand, two hundred fifty-three".