82757819 has 4 divisors (see below), whose sum is σ = 87625944. Its totient is φ = 77889696.

The previous prime is 82757791. The next prime is 82757827. The reversal of 82757819 is 91875728.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-82757819 is a prime.

It is a super-2 number, since 2×82757819² = 13697713211273522, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (82757839) 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, 2434037 + ... + 2434070.

It is an arithmetic number, because the mean of its divisors is an integer number (21906486).

Almost surely, 2^82757819 is an apocalyptic number.

82757819 is a deficient number, since it is larger than the sum of its proper divisors (4868125).

82757819 is a wasteful number, since it uses less digits than its factorization.

82757819 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4868124.

The product of its digits is 282240, while the sum is 47.

The square root of 82757819 is about 9097.1324602866. The cubic root of 82757819 is about 435.7823925325.

The spelling of 82757819 in words is "eighty-two million, seven hundred fifty-seven thousand, eight hundred nineteen".