82801969 has 2 divisors, whose sum is σ = 82801970. Its totient is φ = 82801968.

The previous prime is 82801963. The next prime is 82801973. The reversal of 82801969 is 96910828.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 82719025 + 82944 = 9095^2 + 288^2 .

It is a cyclic number.

It is not a de Polignac number, because 82801969 - 2⁵ = 82801937 is a prime.

It is a super-2 number, since 2×82801969² = 13712332140553922, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (82801963) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 41400984 + 41400985.

It is an arithmetic number, because the mean of its divisors is an integer number (41400985).

Almost surely, 2^82801969 is an apocalyptic number.

It is an amenable number.

82801969 is a deficient number, since it is larger than the sum of its proper divisors (1).

82801969 is an equidigital number, since it uses as much as digits as its factorization.

82801969 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 62208, while the sum is 43.

The square root of 82801969 is about 9099.5587255647. The cubic root of 82801969 is about 435.8598731158.

The spelling of 82801969 in words is "eighty-two million, eight hundred one thousand, nine hundred sixty-nine".