91442827 has 4 divisors (see below), whose sum is σ = 104506096. Its totient is φ = 78379560.

The previous prime is 91442797. The next prime is 91442831. The reversal of 91442827 is 72824419.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 72824419 = 1607 ⋅45317.

It is not a de Polignac number, because 91442827 - 2⁷ = 91442699 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (91442867) 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, 6531624 + ... + 6531637.

It is an arithmetic number, because the mean of its divisors is an integer number (26126524).

Almost surely, 2^91442827 is an apocalyptic number.

91442827 is a deficient number, since it is larger than the sum of its proper divisors (13063269).

91442827 is a wasteful number, since it uses less digits than its factorization.

91442827 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13063268.

The product of its digits is 32256, while the sum is 37.

The square root of 91442827 is about 9562.5742872931. The cubic root of 91442827 is about 450.5225649502.

The spelling of 91442827 in words is "ninety-one million, four hundred forty-two thousand, eight hundred twenty-seven".