82387769 has 2 divisors, whose sum is σ = 82387770. Its totient is φ = 82387768.

The previous prime is 82387717. The next prime is 82387807. The reversal of 82387769 is 96778328.

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., 68227600 + 14160169 = 8260^2 + 3763^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-82387769 is a prime.

It is a super-2 number, since 2×82387769² = 13575488961594722, which contains 22 as substring.

It is a Sophie Germain prime.

It is a Chen prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (82387369) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 41193884 + 41193885.

It is an arithmetic number, because the mean of its divisors is an integer number (41193885).

Almost surely, 2^82387769 is an apocalyptic number.

It is an amenable number.

82387769 is a deficient number, since it is larger than the sum of its proper divisors (1).

82387769 is an equidigital number, since it uses as much as digits as its factorization.

82387769 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1016064, while the sum is 50.

The square root of 82387769 is about 9076.7708465070. The cubic root of 82387769 is about 435.1318911294.

The spelling of 82387769 in words is "eighty-two million, three hundred eighty-seven thousand, seven hundred sixty-nine".