73681387 has 8 divisors (see below), whose sum is σ = 81285120. Its totient is φ = 66354240.

The previous prime is 73681381. The next prime is 73681423. The reversal of 73681387 is 78318637.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-73681387 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (73681381) 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 7 ways as a sum of consecutive naturals, for example, 68587 + ... + 69652.

It is an arithmetic number, because the mean of its divisors is an integer number (10160640).

Almost surely, 2^73681387 is an apocalyptic number.

73681387 is a deficient number, since it is larger than the sum of its proper divisors (7603733).

73681387 is a wasteful number, since it uses less digits than its factorization.

73681387 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 138293.

The product of its digits is 169344, while the sum is 43.

The square root of 73681387 is about 8583.7862857832. The cubic root of 73681387 is about 419.2302359408.

The spelling of 73681387 in words is "seventy-three million, six hundred eighty-one thousand, three hundred eighty-seven".