73985999 has 4 divisors (see below), whose sum is σ = 74003640. Its totient is φ = 73968360.

The previous prime is 73985993. The next prime is 73986013. The reversal of 73985999 is 99958937.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-73985999 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 (73985993) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1484 + ... + 12254.

It is an arithmetic number, because the mean of its divisors is an integer number (18500910).

Almost surely, 2^73985999 is an apocalyptic number.

73985999 is a deficient number, since it is larger than the sum of its proper divisors (17641).

73985999 is a wasteful number, since it uses less digits than its factorization.

73985999 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17640.

The product of its digits is 5511240, while the sum is 59.

The square root of 73985999 is about 8601.5114369511. The cubic root of 73985999 is about 419.8071658240.

The spelling of 73985999 in words is "seventy-three million, nine hundred eighty-five thousand, nine hundred ninety-nine".