73999 has 2 divisors, whose sum is σ = 74000. Its totient is φ = 73998.

The previous prime is 73973. The next prime is 74017. The reversal of 73999 is 99937.

It is a happy number.

73999 is nontrivially palindromic in base 6.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 73999 - 2¹⁵ = 41231 is a prime.

73999 is a modest number, since divided by 999 gives 73 as remainder.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (73939) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a good prime.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 36999 + 37000.

It is an arithmetic number, because the mean of its divisors is an integer number (37000).

2⁷³⁹⁹⁹ is an apocalyptic number.

73999 is a deficient number, since it is larger than the sum of its proper divisors (1).

73999 is an equidigital number, since it uses as much as digits as its factorization.

73999 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 15309, while the sum is 37.

The square root of 73999 is about 272.0275721319. The cubic root of 73999 is about 41.9831754230.

It can be divided in two parts, 739 and 99, that added together give a palindrome (838).

The spelling of 73999 in words is "seventy-three thousand, nine hundred ninety-nine".