91829869 has 32 divisors (see below), whose sum is σ = 109486080. Its totient is φ = 76361472.

The previous prime is 91829851. The next prime is 91829879. The reversal of 91829869 is 96892819.

It is not a de Polignac number, because 91829869 - 2¹³ = 91821677 is a prime.

It is a super-2 number, since 2×91829869² = 16865449681114322, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (91829809) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 349032 + ... + 349294.

It is an arithmetic number, because the mean of its divisors is an integer number (3421440).

Almost surely, 2^91829869 is an apocalyptic number.

It is an amenable number.

91829869 is a deficient number, since it is larger than the sum of its proper divisors (17656211).

91829869 is a wasteful number, since it uses less digits than its factorization.

91829869 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 369.

The product of its digits is 559872, while the sum is 52.

The square root of 91829869 is about 9582.7902512786. The cubic root of 91829869 is about 451.1572993229.

The spelling of 91829869 in words is "ninety-one million, eight hundred twenty-nine thousand, eight hundred sixty-nine".