83626681 has 2 divisors, whose sum is σ = 83626682. Its totient is φ = 83626680.

The previous prime is 83626679. The next prime is 83626693. The reversal of 83626681 is 18662638.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 65351056 + 18275625 = 8084^2 + 4275^2 .

It is a cyclic number.

It is not a de Polignac number, because 83626681 - 2¹ = 83626679 is a prime.

It is a super-2 number, since 2×83626681² = 13986843550151522, which contains 22 as substring.

Together with 83626679, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (83623681) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 41813340 + 41813341.

It is an arithmetic number, because the mean of its divisors is an integer number (41813341).

Almost surely, 2^83626681 is an apocalyptic number.

It is an amenable number.

83626681 is a deficient number, since it is larger than the sum of its proper divisors (1).

83626681 is an equidigital number, since it uses as much as digits as its factorization.

83626681 is an evil number, because the sum of its binary digits is even.

The product of its digits is 82944, while the sum is 40.

The square root of 83626681 is about 9144.7624900814. The cubic root of 83626681 is about 437.3021577307.

The spelling of 83626681 in words is "eighty-three million, six hundred twenty-six thousand, six hundred eighty-one".