73817383987 has 4 divisors (see below), whose sum is σ = 77702509480. Its totient is φ = 69932258496.

The previous prime is 73817383979. The next prime is 73817383999. The reversal of 73817383987 is 78938371837.

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

It is not a de Polignac number, because 73817383987 - 2³ = 73817383979 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (73817383967) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1942562718 + ... + 1942562755.

It is an arithmetic number, because the mean of its divisors is an integer number (19425627370).

Almost surely, 2^73817383987 is an apocalyptic number.

73817383987 is a deficient number, since it is larger than the sum of its proper divisors (3885125493).

73817383987 is a wasteful number, since it uses less digits than its factorization.

73817383987 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3885125492.

The product of its digits is 42674688, while the sum is 64.

The spelling of 73817383987 in words is "seventy-three billion, eight hundred seventeen million, three hundred eighty-three thousand, nine hundred eighty-seven".