91079173 has 4 divisors (see below), whose sum is σ = 91118560. Its totient is φ = 91039788.

The previous prime is 91079167. The next prime is 91079189. The reversal of 91079173 is 37197019.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 37197019 = 1187 ⋅31337.

It is a cyclic number.

It is not a de Polignac number, because 91079173 - 2¹³ = 91070981 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (91079113) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 15993 + ... + 20926.

It is an arithmetic number, because the mean of its divisors is an integer number (22779640).

Almost surely, 2^91079173 is an apocalyptic number.

It is an amenable number.

91079173 is a deficient number, since it is larger than the sum of its proper divisors (39387).

91079173 is a wasteful number, since it uses less digits than its factorization.

91079173 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 39386.

The product of its (nonzero) digits is 11907, while the sum is 37.

The square root of 91079173 is about 9543.5409047167. The cubic root of 91079173 is about 449.9245519600.

The spelling of 91079173 in words is "ninety-one million, seventy-nine thousand, one hundred seventy-three".