82747493 has 4 divisors (see below), whose sum is σ = 82765740. Its totient is φ = 82729248.

The previous prime is 82747403. The next prime is 82747501. The reversal of 82747493 is 39474728.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It can be written as a sum of positive squares in 2 ways, for example, as 55100929 + 27646564 = 7423^2 + 5258^2 .

It is a cyclic number.

It is not a de Polignac number, because 82747493 - 2¹⁶ = 82681957 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (82747403) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3521 + ... + 13337.

It is an arithmetic number, because the mean of its divisors is an integer number (20691435).

Almost surely, 2^82747493 is an apocalyptic number.

It is an amenable number.

82747493 is a deficient number, since it is larger than the sum of its proper divisors (18247).

82747493 is an equidigital number, since it uses as much as digits as its factorization.

82747493 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18246.

The product of its digits is 338688, while the sum is 44.

The square root of 82747493 is about 9096.5649011042. The cubic root of 82747493 is about 435.7642670502.

Adding to 82747493 its reverse (39474728), we get a palindrome (122222221).

The spelling of 82747493 in words is "eighty-two million, seven hundred forty-seven thousand, four hundred ninety-three".