73309703387 has 4 divisors (see below), whose sum is σ = 73310776176. Its totient is φ = 73308630600.

The previous prime is 73309703351. The next prime is 73309703399. The reversal of 73309703387 is 78330790337.

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

It is a cyclic number.

It is not a de Polignac number, because 73309703387 - 2⁶ = 73309703323 is a prime.

It is a super-2 number, since 2×73309703387² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (73309703087) 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, 426368 + ... + 573069.

It is an arithmetic number, because the mean of its divisors is an integer number (18327694044).

Almost surely, 2^73309703387 is an apocalyptic number.

73309703387 is a deficient number, since it is larger than the sum of its proper divisors (1072789).

73309703387 is an equidigital number, since it uses as much as digits as its factorization.

73309703387 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1072788.

The product of its (nonzero) digits is 2000376, while the sum is 50.

The spelling of 73309703387 in words is "seventy-three billion, three hundred nine million, seven hundred three thousand, three hundred eighty-seven".