91023829 has 8 divisors (see below), whose sum is σ = 98926520. Its totient is φ = 83249856.

The previous prime is 91023817. The next prime is 91023839. The reversal of 91023829 is 92832019.

It can be written as a sum of positive squares in 4 ways, for example, as 17098225 + 73925604 = 4135^2 + 8598^2 .

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

It is a cyclic number.

It is not a de Polignac number, because 91023829 - 2²³ = 82635221 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 91023794 and 91023803.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (91023839) 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, 30702 + ... + 33535.

It is an arithmetic number, because the mean of its divisors is an integer number (12365815).

Almost surely, 2^91023829 is an apocalyptic number.

It is an amenable number.

91023829 is a deficient number, since it is larger than the sum of its proper divisors (7902691).

91023829 is a wasteful number, since it uses less digits than its factorization.

91023829 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 64359.

The product of its (nonzero) digits is 7776, while the sum is 34.

The square root of 91023829 is about 9540.6409113854. The cubic root of 91023829 is about 449.8334017043.

The spelling of 91023829 in words is "ninety-one million, twenty-three thousand, eight hundred twenty-nine".