91249530 has 16 divisors (see below), whose sum is σ = 218998944. Its totient is φ = 24333200.

The previous prime is 91249507. The next prime is 91249531. The reversal of 91249530 is 3594219.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 91249491 and 91249500.

It is not an unprimeable number, because it can be changed into a prime (91249531) 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, 1520796 + ... + 1520855.

It is an arithmetic number, because the mean of its divisors is an integer number (13687434).

Almost surely, 2^91249530 is an apocalyptic number.

91249530 is an abundant number, since it is smaller than the sum of its proper divisors (127749414).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

91249530 is a wasteful number, since it uses less digits than its factorization.

91249530 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3041661.

The product of its (nonzero) digits is 9720, while the sum is 33.

The square root of 91249530 is about 9552.4619863154. The cubic root of 91249530 is about 450.2048943475.

The spelling of 91249530 in words is "ninety-one million, two hundred forty-nine thousand, five hundred thirty".