73971985 has 8 divisors (see below), whose sum is σ = 89257896. Its totient is φ = 58849920.

The previous prime is 73971973. The next prime is 73972009. The reversal of 73971985 is 58917937.

It can be written as a sum of positive squares in 4 ways, for example, as 2214144 + 71757841 = 1488^2 + 8471^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 73971985 - 2⁷ = 73971857 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 39964 + ... + 41773.

It is an arithmetic number, because the mean of its divisors is an integer number (11157237).

Almost surely, 2^73971985 is an apocalyptic number.

It is an amenable number.

73971985 is a deficient number, since it is larger than the sum of its proper divisors (15285911).

73971985 is a wasteful number, since it uses less digits than its factorization.

73971985 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 81923.

The product of its digits is 476280, while the sum is 49.

The square root of 73971985 is about 8600.6967740992. The cubic root of 73971985 is about 419.7806583352.

The spelling of 73971985 in words is "seventy-three million, nine hundred seventy-one thousand, nine hundred eighty-five".