91424 has 12 divisors (see below), whose sum is σ = 180054. Its totient is φ = 45696.

The previous prime is 91423. The next prime is 91433. The reversal of 91424 is 42419.

It can be written as a sum of positive squares in only one way, i.e., 71824 + 19600 = 268^2 + 140^2 .

It is a junction number, because it is equal to n+sod(n) for n = 91396 and 91405.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 91424.

It is not an unprimeable number, because it can be changed into a prime (91423) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1397 + ... + 1460.

2⁹¹⁴²⁴ is an apocalyptic number.

It is an amenable number.

91424 is a deficient number, since it is larger than the sum of its proper divisors (88630).

91424 is a wasteful number, since it uses less digits than its factorization.

91424 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2867 (or 2859 counting only the distinct ones).

The product of its digits is 288, while the sum is 20.

The square root of 91424 is about 302.3640190234. The cubic root of 91424 is about 45.0491643733.

It can be divided in two parts, 91 and 424, that added together give a palindrome (515).

The spelling of 91424 in words is "ninety-one thousand, four hundred twenty-four".