84173899 has 2 divisors, whose sum is σ = 84173900. Its totient is φ = 84173898.

The previous prime is 84173879. The next prime is 84173917. The reversal of 84173899 is 99837148.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 84173899 - 2⁵ = 84173867 is a prime.

It is not a weakly prime, because it can be changed into another prime (84173809) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 42086949 + 42086950.

It is an arithmetic number, because the mean of its divisors is an integer number (42086950).

Almost surely, 2^84173899 is an apocalyptic number.

84173899 is a deficient number, since it is larger than the sum of its proper divisors (1).

84173899 is an equidigital number, since it uses as much as digits as its factorization.

84173899 is an evil number, because the sum of its binary digits is even.

The product of its digits is 435456, while the sum is 49.

The square root of 84173899 is about 9174.6334531686. The cubic root of 84173899 is about 438.2539255147.

The spelling of 84173899 in words is "eighty-four million, one hundred seventy-three thousand, eight hundred ninety-nine".