91120323 has 16 divisors (see below), whose sum is σ = 147018240. Its totient is φ = 49005696.

The previous prime is 91120321. The next prime is 91120339. The reversal of 91120323 is 32302119.

It is a happy number.

It is not a de Polignac number, because 91120323 - 2¹ = 91120321 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is a self number, because there is not a number n which added to its sum of digits gives 91120323.

It is not an unprimeable number, because it can be changed into a prime (91120321) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 127263 + ... + 127976.

It is an arithmetic number, because the mean of its divisors is an integer number (9188640).

Almost surely, 2^91120323 is an apocalyptic number.

91120323 is a deficient number, since it is larger than the sum of its proper divisors (55897917).

91120323 is a wasteful number, since it uses less digits than its factorization.

91120323 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 255266.

The product of its (nonzero) digits is 324, while the sum is 21.

The square root of 91120323 is about 9545.6965696590. The cubic root of 91120323 is about 449.9923011029.

The spelling of 91120323 in words is "ninety-one million, one hundred twenty thousand, three hundred twenty-three".