91423533 has 8 divisors (see below), whose sum is σ = 122445568. Its totient is φ = 60675264.

The previous prime is 91423531. The next prime is 91423561. The reversal of 91423533 is 33532419.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 91423533 - 2¹ = 91423531 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 91423533.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (91423531) 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 7 ways as a sum of consecutive naturals, for example, 67660 + ... + 68997.

It is an arithmetic number, because the mean of its divisors is an integer number (15305696).

Almost surely, 2^91423533 is an apocalyptic number.

It is an amenable number.

91423533 is a deficient number, since it is larger than the sum of its proper divisors (31022035).

91423533 is a wasteful number, since it uses less digits than its factorization.

91423533 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 136883.

The product of its digits is 9720, while the sum is 30.

The square root of 91423533 is about 9561.5654053089. The cubic root of 91423533 is about 450.4908766845.

The spelling of 91423533 in words is "ninety-one million, four hundred twenty-three thousand, five hundred thirty-three".