91473953 has 8 divisors (see below), whose sum is σ = 95488680. Its totient is φ = 87540480.

The previous prime is 91473929. The next prime is 91473959. The reversal of 91473953 is 35937419.

It can be written as a sum of positive squares in 4 ways, for example, as 28858384 + 62615569 = 5372^2 + 7913^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 91473953 - 2²⁴ = 74696737 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 91473953.

It is not an unprimeable number, because it can be changed into a prime (91473959) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 18008 + ... + 22521.

It is an arithmetic number, because the mean of its divisors is an integer number (11936085).

Almost surely, 2^91473953 is an apocalyptic number.

It is an amenable number.

91473953 is a deficient number, since it is larger than the sum of its proper divisors (4014727).

91473953 is a wasteful number, since it uses less digits than its factorization.

91473953 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 40627.

The product of its digits is 102060, while the sum is 41.

The square root of 91473953 is about 9564.2016394470. The cubic root of 91473953 is about 450.5736765756.

The spelling of 91473953 in words is "ninety-one million, four hundred seventy-three thousand, nine hundred fifty-three".