91673123 has 2 divisors, whose sum is σ = 91673124. Its totient is φ = 91673122.

The previous prime is 91673117. The next prime is 91673143. The reversal of 91673123 is 32137619.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 91673123 - 2¹⁰ = 91672099 is a prime.

It is a super-2 number, since 2×91673123² = 16807922961146258, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 91673123.

It is not a weakly prime, because it can be changed into another prime (91673143) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 45836561 + 45836562.

It is an arithmetic number, because the mean of its divisors is an integer number (45836562).

Almost surely, 2^91673123 is an apocalyptic number.

91673123 is a deficient number, since it is larger than the sum of its proper divisors (1).

91673123 is an equidigital number, since it uses as much as digits as its factorization.

91673123 is an evil number, because the sum of its binary digits is even.

The product of its digits is 6804, while the sum is 32.

The square root of 91673123 is about 9574.6082426384. The cubic root of 91673123 is about 450.9004570518.

The spelling of 91673123 in words is "ninety-one million, six hundred seventy-three thousand, one hundred twenty-three".