91489830 has 16 divisors (see below), whose sum is σ = 219575664. Its totient is φ = 24397280.

The previous prime is 91489829. The next prime is 91489831. The reversal of 91489830 is 3898419.

It is an interprime number because it is at equal distance from previous prime (91489829) and next prime (91489831).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (91489831) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1524801 + ... + 1524860.

It is an arithmetic number, because the mean of its divisors is an integer number (13723479).

Almost surely, 2^91489830 is an apocalyptic number.

91489830 is an abundant number, since it is smaller than the sum of its proper divisors (128085834).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

91489830 is a wasteful number, since it uses less digits than its factorization.

91489830 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3049671.

The product of its (nonzero) digits is 62208, while the sum is 42.

The square root of 91489830 is about 9565.0316256665. The cubic root of 91489830 is about 450.5997435385.

The spelling of 91489830 in words is "ninety-one million, four hundred eighty-nine thousand, eight hundred thirty".