91673143 has 2 divisors, whose sum is σ = 91673144. Its totient is φ = 91673142.

The previous prime is 91673123. The next prime is 91673149. The reversal of 91673143 is 34137619.

It is a strong prime.

It is an emirp because it is prime and its reverse (34137619) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 91673143 - 2⁵ = 91673111 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 91673099 and 91673108.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (91673149) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 45836571 + 45836572.

It is an arithmetic number, because the mean of its divisors is an integer number (45836572).

Almost surely, 2^91673143 is an apocalyptic number.

91673143 is a deficient number, since it is larger than the sum of its proper divisors (1).

91673143 is an equidigital number, since it uses as much as digits as its factorization.

91673143 is an evil number, because the sum of its binary digits is even.

The product of its digits is 13608, while the sum is 34.

The square root of 91673143 is about 9574.6092870675. The cubic root of 91673143 is about 450.9004898423.

The spelling of 91673143 in words is "ninety-one million, six hundred seventy-three thousand, one hundred forty-three".