91471420 has 12 divisors (see below), whose sum is σ = 192090024. Its totient is φ = 36588560.

The previous prime is 91471399. The next prime is 91471463. The reversal of 91471420 is 2417419.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2286766 + ... + 2286805.

It is an arithmetic number, because the mean of its divisors is an integer number (16007502).

Almost surely, 2^91471420 is an apocalyptic number.

It is an amenable number.

91471420 is an abundant number, since it is smaller than the sum of its proper divisors (100618604).

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

91471420 is a wasteful number, since it uses less digits than its factorization.

91471420 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4573580 (or 4573578 counting only the distinct ones).

The product of its (nonzero) digits is 2016, while the sum is 28.

The square root of 91471420 is about 9564.0692176500. The cubic root of 91471420 is about 450.5695176006.

Adding to 91471420 its reverse (2417419), we get a palindrome (93888839).

The spelling of 91471420 in words is "ninety-one million, four hundred seventy-one thousand, four hundred twenty".