82886989 has 2 divisors, whose sum is σ = 82886990. Its totient is φ = 82886988.

The previous prime is 82886971. The next prime is 82887001. The reversal of 82886989 is 98968828.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 52272900 + 30614089 = 7230^2 + 5533^2 .

It is a cyclic number.

It is not a de Polignac number, because 82886989 - 2⁵ = 82886957 is a prime.

It is a super-2 number, since 2×82886989² = 13740505890972242, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (82886939) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 41443494 + 41443495.

It is an arithmetic number, because the mean of its divisors is an integer number (41443495).

Almost surely, 2^82886989 is an apocalyptic number.

It is an amenable number.

82886989 is a deficient number, since it is larger than the sum of its proper divisors (1).

82886989 is an equidigital number, since it uses as much as digits as its factorization.

82886989 is an evil number, because the sum of its binary digits is even.

The product of its digits is 3981312, while the sum is 58.

The square root of 82886989 is about 9104.2291820889. The cubic root of 82886989 is about 436.0090005296.

The spelling of 82886989 in words is "eighty-two million, eight hundred eighty-six thousand, nine hundred eighty-nine".