81022679 has 2 divisors, whose sum is σ = 81022680. Its totient is φ = 81022678.

The previous prime is 81022649. The next prime is 81022699. The reversal of 81022679 is 97622018.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 81022679 - 2⁸ = 81022423 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (81022649) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 40511339 + 40511340.

It is an arithmetic number, because the mean of its divisors is an integer number (40511340).

Almost surely, 2^81022679 is an apocalyptic number.

81022679 is a deficient number, since it is larger than the sum of its proper divisors (1).

81022679 is an equidigital number, since it uses as much as digits as its factorization.

81022679 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 12096, while the sum is 35.

The square root of 81022679 is about 9001.2598562646. The cubic root of 81022679 is about 432.7152485315.

The spelling of 81022679 in words is "eighty-one million, twenty-two thousand, six hundred seventy-nine".