91650233 has 4 divisors (see below), whose sum is σ = 91709220. Its totient is φ = 91591248.

The previous prime is 91650227. The next prime is 91650257. The reversal of 91650233 is 33205619.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 33205619 = 31 ⋅1071149.

It can be written as a sum of positive squares in 2 ways, for example, as 41126569 + 50523664 = 6413^2 + 7108^2 .

It is a cyclic number.

It is not a de Polignac number, because 91650233 - 2¹⁴ = 91633849 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 91650196 and 91650205.

It is not an unprimeable number, because it can be changed into a prime (91652233) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 27098 + ... + 30291.

It is an arithmetic number, because the mean of its divisors is an integer number (22927305).

Almost surely, 2^91650233 is an apocalyptic number.

It is an amenable number.

91650233 is a deficient number, since it is larger than the sum of its proper divisors (58987).

91650233 is a wasteful number, since it uses less digits than its factorization.

91650233 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 58986.

The product of its (nonzero) digits is 4860, while the sum is 29.

The square root of 91650233 is about 9573.4128188437. The cubic root of 91650233 is about 450.8629252567.

The spelling of 91650233 in words is "ninety-one million, six hundred fifty thousand, two hundred thirty-three".