73903720733 has 4 divisors (see below), whose sum is σ = 73971337308. Its totient is φ = 73836104160.

The previous prime is 73903720717. The next prime is 73903720757. The reversal of 73903720733 is 33702730937.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 33702730937 = 140527 ⋅239831.

It can be written as a sum of positive squares in 2 ways, for example, as 46368300889 + 27535419844 = 215333^2 + 165938^2 .

It is a cyclic number.

It is not a de Polignac number, because 73903720733 - 2⁴ = 73903720717 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (73903722733) 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, 33806648 + ... + 33808833.

It is an arithmetic number, because the mean of its divisors is an integer number (18492834327).

Almost surely, 2^73903720733 is an apocalyptic number.

It is an amenable number.

73903720733 is a deficient number, since it is larger than the sum of its proper divisors (67616575).

73903720733 is a wasteful number, since it uses less digits than its factorization.

73903720733 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 67616574.

The product of its (nonzero) digits is 500094, while the sum is 44.

The spelling of 73903720733 in words is "seventy-three billion, nine hundred three million, seven hundred twenty thousand, seven hundred thirty-three".