82569389 has 16 divisors (see below), whose sum is σ = 96553728. Its totient is φ = 69144192.

The previous prime is 82569373. The next prime is 82569401. The reversal of 82569389 is 98396528.

It is a cyclic number.

It is not a de Polignac number, because 82569389 - 2⁴ = 82569373 is a prime.

It is a Smith number, since the sum of its digits (50) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (82569349) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 169304 + ... + 169790.

It is an arithmetic number, because the mean of its divisors is an integer number (6034608).

Almost surely, 2^82569389 is an apocalyptic number.

It is an amenable number.

82569389 is a deficient number, since it is larger than the sum of its proper divisors (13984339).

82569389 is a wasteful number, since it uses less digits than its factorization.

82569389 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1004.

The product of its digits is 933120, while the sum is 50.

The square root of 82569389 is about 9086.7699981897. The cubic root of 82569389 is about 435.4513991275.

The spelling of 82569389 in words is "eighty-two million, five hundred sixty-nine thousand, three hundred eighty-nine".