73893796621 has 2 divisors, whose sum is σ = 73893796622. Its totient is φ = 73893796620.

The previous prime is 73893796609. The next prime is 73893796631. The reversal of 73893796621 is 12669739837.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 73121568100 + 772228521 = 270410^2 + 27789^2 .

It is a cyclic number.

It is not a de Polignac number, because 73893796621 - 2¹¹ = 73893794573 is a prime.

It is a super-2 number, since 2×73893796621² (a number of 23 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 73893796621.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (73893796601) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 36946898310 + 36946898311.

It is an arithmetic number, because the mean of its divisors is an integer number (36946898311).

Almost surely, 2^73893796621 is an apocalyptic number.

It is an amenable number.

73893796621 is a deficient number, since it is larger than the sum of its proper divisors (1).

73893796621 is an equidigital number, since it uses as much as digits as its factorization.

73893796621 is an evil number, because the sum of its binary digits is even.

The product of its digits is 20575296, while the sum is 61.

The spelling of 73893796621 in words is "seventy-three billion, eight hundred ninety-three million, seven hundred ninety-six thousand, six hundred twenty-one".