83936681 has 2 divisors, whose sum is σ = 83936682. Its totient is φ = 83936680.

The previous prime is 83936663. The next prime is 83936707. The reversal of 83936681 is 18663938.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 52070656 + 31866025 = 7216^2 + 5645^2 .

It is a cyclic number.

It is not a de Polignac number, because 83936681 - 2²⁶ = 16827817 is a prime.

It is a super-2 number, since 2×83936681² = 14090732834591522, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (83936621) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 41968340 + 41968341.

It is an arithmetic number, because the mean of its divisors is an integer number (41968341).

Almost surely, 2^83936681 is an apocalyptic number.

It is an amenable number.

83936681 is a deficient number, since it is larger than the sum of its proper divisors (1).

83936681 is an equidigital number, since it uses as much as digits as its factorization.

83936681 is an evil number, because the sum of its binary digits is even.

The product of its digits is 186624, while the sum is 44.

The square root of 83936681 is about 9161.6964040509. The cubic root of 83936681 is about 437.8418439573.

The spelling of 83936681 in words is "eighty-three million, nine hundred thirty-six thousand, six hundred eighty-one".