91252939 has 4 divisors (see below), whose sum is σ = 92352456. Its totient is φ = 90153424.

The previous prime is 91252927. The next prime is 91252943. The reversal of 91252939 is 93925219.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 91252939 - 2¹¹ = 91250891 is a prime.

It is a super-2 number, since 2×91252939² = 16654197752275442, which contains 22 as substring.

It is a Smith number, since the sum of its digits (40) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (91252969) by changing a digit.

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, 549634 + ... + 549799.

It is an arithmetic number, because the mean of its divisors is an integer number (23088114).

Almost surely, 2^91252939 is an apocalyptic number.

91252939 is a deficient number, since it is larger than the sum of its proper divisors (1099517).

91252939 is a wasteful number, since it uses less digits than its factorization.

91252939 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1099516.

The product of its digits is 43740, while the sum is 40.

The square root of 91252939 is about 9552.6404203236. The cubic root of 91252939 is about 450.2105006937.

The spelling of 91252939 in words is "ninety-one million, two hundred fifty-two thousand, nine hundred thirty-nine".