82766989 has 8 divisors (see below), whose sum is σ = 84015360. Its totient is φ = 81527376.

The previous prime is 82766977. The next prime is 82767001. The reversal of 82766989 is 98966728.

It is an interprime number because it is at equal distance from previous prime (82766977) and next prime (82767001).

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 82766989 - 2⁹ = 82766477 is a prime.

It is a super-2 number, since 2×82766989² = 13700748936252242, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (82766939) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 18252 + ... + 22330.

It is an arithmetic number, because the mean of its divisors is an integer number (10501920).

Almost surely, 2^82766989 is an apocalyptic number.

It is an amenable number.

82766989 is a deficient number, since it is larger than the sum of its proper divisors (1248371).

82766989 is a wasteful number, since it uses less digits than its factorization.

82766989 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4379.

The product of its digits is 2612736, while the sum is 55.

The square root of 82766989 is about 9097.6364512988. The cubic root of 82766989 is about 435.7984875956.

The spelling of 82766989 in words is "eighty-two million, seven hundred sixty-six thousand, nine hundred eighty-nine".