83396897681 has 4 divisors (see below), whose sum is σ = 83397537972. Its totient is φ = 83396257392.

The previous prime is 83396897669. The next prime is 83396897687. The reversal of 83396897681 is 18679869338.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It can be written as a sum of positive squares in 2 ways, for example, as 62192878225 + 21204019456 = 249385^2 + 145616^2 .

It is a cyclic number.

It is not a de Polignac number, because 83396897681 - 2¹⁴ = 83396881297 is a prime.

It is a super-2 number, since 2×83396897681² (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 (83396897687) 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, 47210 + ... + 411123.

It is an arithmetic number, because the mean of its divisors is an integer number (20849384493).

Almost surely, 2^83396897681 is an apocalyptic number.

It is an amenable number.

83396897681 is a deficient number, since it is larger than the sum of its proper divisors (640291).

83396897681 is a wasteful number, since it uses less digits than its factorization.

83396897681 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 640290.

The product of its digits is 94058496, while the sum is 68.

The spelling of 83396897681 in words is "eighty-three billion, three hundred ninety-six million, eight hundred ninety-seven thousand, six hundred eighty-one".