73897737773 has 8 divisors (see below), whose sum is σ = 74637925560. Its totient is φ = 73158681600.

The previous prime is 73897737757. The next prime is 73897737787. The reversal of 73897737773 is 37773779837.

It can be written as a sum of positive squares in 4 ways, for example, as 6962734249 + 66935003524 = 83443^2 + 258718^2 .

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

It is a cyclic number.

It is not a de Polignac number, because 73897737773 - 2⁴ = 73897737757 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 (73897737373) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 151340 + ... + 413157.

It is an arithmetic number, because the mean of its divisors is an integer number (9329740695).

Almost surely, 2^73897737773 is an apocalyptic number.

It is an amenable number.

73897737773 is a deficient number, since it is larger than the sum of its proper divisors (740187787).

73897737773 is a wasteful number, since it uses less digits than its factorization.

73897737773 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 565807.

The product of its digits is 228709656, while the sum is 68.

The spelling of 73897737773 in words is "seventy-three billion, eight hundred ninety-seven million, seven hundred thirty-seven thousand, seven hundred seventy-three".