82697643 has 60 divisors (see below), whose sum is σ = 144195480. Its totient is φ = 45638208.

The previous prime is 82697623. The next prime is 82697653. The reversal of 82697643 is 34679628.

It is not a de Polignac number, because 82697643 - 2¹² = 82693547 is a prime.

It is not an unprimeable number, because it can be changed into a prime (82697603) by changing a digit.

It is a polite number, since it can be written in 59 ways as a sum of consecutive naturals, for example, 929143 + ... + 929231.

It is an arithmetic number, because the mean of its divisors is an integer number (2403258).

Almost surely, 2^82697643 is an apocalyptic number.

82697643 is a deficient number, since it is larger than the sum of its proper divisors (61497837).

82697643 is an equidigital number, since it uses as much as digits as its factorization.

82697643 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 166 (or 142 counting only the distinct ones).

The product of its digits is 435456, while the sum is 45.

The square root of 82697643 is about 9093.8244429943. The cubic root of 82697643 is about 435.6767428985.

The spelling of 82697643 in words is "eighty-two million, six hundred ninety-seven thousand, six hundred forty-three".