82947719 has 4 divisors (see below), whose sum is σ = 83278440. Its totient is φ = 82617000.

The previous prime is 82947713. The next prime is 82947721. The reversal of 82947719 is 91774928.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 82947719 - 2⁸ = 82947463 is a prime.

It is a super-2 number, since 2×82947719² = 13760648174605922, 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 (82947713) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 164984 + ... + 165485.

It is an arithmetic number, because the mean of its divisors is an integer number (20819610).

Almost surely, 2^82947719 is an apocalyptic number.

82947719 is a deficient number, since it is larger than the sum of its proper divisors (330721).

82947719 is a wasteful number, since it uses less digits than its factorization.

82947719 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 330720.

The product of its digits is 254016, while the sum is 47.

The square root of 82947719 is about 9107.5638345279. The cubic root of 82947719 is about 436.1154601911.

The spelling of 82947719 in words is "eighty-two million, nine hundred forty-seven thousand, seven hundred nineteen".