91471436 has 36 divisors (see below), whose sum is σ = 186760728. Its totient is φ = 39086208.

The previous prime is 91471399. The next prime is 91471463. The reversal of 91471436 is 63417419.

It is a nialpdrome in base 14.

It is a junction number, because it is equal to n+sod(n) for n = 91471396 and 91471405.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 115835 + ... + 116621.

It is an arithmetic number, because the mean of its divisors is an integer number (5187798).

Almost surely, 2^91471436 is an apocalyptic number.

It is an amenable number.

91471436 is an abundant number, since it is smaller than the sum of its proper divisors (95289292).

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

91471436 is a wasteful number, since it uses less digits than its factorization.

With its successor (91471437) it forms an eRAP, since the sums of their prime factors are consecutive (1398 and 1399).

91471436 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1398 (or 1389 counting only the distinct ones).

The product of its digits is 18144, while the sum is 35.

The square root of 91471436 is about 9564.0700541140. The cubic root of 91471436 is about 450.5695438715.

The spelling of 91471436 in words is "ninety-one million, four hundred seventy-one thousand, four hundred thirty-six".