73165987 has 4 divisors (see below), whose sum is σ = 73257016. Its totient is φ = 73074960.

The previous prime is 73165933. The next prime is 73166029. The reversal of 73165987 is 78956137.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 78956137 = 13 ⋅6073549.

It is a cyclic number.

It is not a de Polignac number, because 73165987 - 2¹¹ = 73163939 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (73165907) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 44298 + ... + 45919.

It is an arithmetic number, because the mean of its divisors is an integer number (18314254).

Almost surely, 2^73165987 is an apocalyptic number.

73165987 is a deficient number, since it is larger than the sum of its proper divisors (91029).

73165987 is an equidigital number, since it uses as much as digits as its factorization.

73165987 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 91028.

The product of its digits is 317520, while the sum is 46.

The square root of 73165987 is about 8553.7118843225. The cubic root of 73165987 is about 418.2504451400.

The spelling of 73165987 in words is "seventy-three million, one hundred sixty-five thousand, nine hundred eighty-seven".