82989819 has 32 divisors (see below), whose sum is σ = 139968000. Its totient is φ = 48106080.

The previous prime is 82989817. The next prime is 82989839. The reversal of 82989819 is 91898928.

It is a happy number.

It is not a de Polignac number, because 82989819 - 2¹ = 82989817 is a prime.

It is a super-2 number, since 2×82989819² = 13774620115305522, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (82989817) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 757 + ... + 12905.

It is an arithmetic number, because the mean of its divisors is an integer number (4374000).

Almost surely, 2^82989819 is an apocalyptic number.

82989819 is a deficient number, since it is larger than the sum of its proper divisors (56978181).

82989819 is a wasteful number, since it uses less digits than its factorization.

82989819 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12192 (or 12186 counting only the distinct ones).

The product of its digits is 746496, while the sum is 54.

The square root of 82989819 is about 9109.8748070432. The cubic root of 82989819 is about 436.1892309778.

The spelling of 82989819 in words is "eighty-two million, nine hundred eighty-nine thousand, eight hundred nineteen".