91713073 has 8 divisors (see below), whose sum is σ = 93486080. Its totient is φ = 89948880.

The previous prime is 91713071. The next prime is 91713077. The reversal of 91713073 is 37031719.

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 91713073 - 2¹ = 91713071 is a prime.

It is a super-2 number, since 2×91713073² = 16822575518206658, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (91713071) 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, 21136 + ... + 25102.

It is an arithmetic number, because the mean of its divisors is an integer number (11685760).

Almost surely, 2^91713073 is an apocalyptic number.

It is an amenable number.

91713073 is a deficient number, since it is larger than the sum of its proper divisors (1773007).

91713073 is a wasteful number, since it uses less digits than its factorization.

91713073 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4407.

The product of its (nonzero) digits is 3969, while the sum is 31.

The square root of 91713073 is about 9576.6942626357. The cubic root of 91713073 is about 450.9659464654.

The spelling of 91713073 in words is "ninety-one million, seven hundred thirteen thousand, seventy-three".