82694561 has 2 divisors, whose sum is σ = 82694562. Its totient is φ = 82694560.

The previous prime is 82694551. The next prime is 82694609. The reversal of 82694561 is 16549628.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 76667536 + 6027025 = 8756^2 + 2455^2 .

It is a cyclic number.

It is not a de Polignac number, because 82694561 - 2⁶ = 82694497 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (82694531) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 41347280 + 41347281.

It is an arithmetic number, because the mean of its divisors is an integer number (41347281).

Almost surely, 2^82694561 is an apocalyptic number.

It is an amenable number.

82694561 is a deficient number, since it is larger than the sum of its proper divisors (1).

82694561 is an equidigital number, since it uses as much as digits as its factorization.

82694561 is an evil number, because the sum of its binary digits is even.

The product of its digits is 103680, while the sum is 41.

The square root of 82694561 is about 9093.6549857579. The cubic root of 82694561 is about 435.6713305218.

The spelling of 82694561 in words is "eighty-two million, six hundred ninety-four thousand, five hundred sixty-one".