82486813 has 2 divisors, whose sum is σ = 82486814. Its totient is φ = 82486812.

The previous prime is 82486799. The next prime is 82486837. The reversal of 82486813 is 31868428.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 82410084 + 76729 = 9078^2 + 277^2 .

It is a cyclic number.

It is not a de Polignac number, because 82486813 - 2²⁵ = 48932381 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (82486843) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 41243406 + 41243407.

It is an arithmetic number, because the mean of its divisors is an integer number (41243407).

Almost surely, 2^82486813 is an apocalyptic number.

It is an amenable number.

82486813 is a deficient number, since it is larger than the sum of its proper divisors (1).

82486813 is an equidigital number, since it uses as much as digits as its factorization.

82486813 is an evil number, because the sum of its binary digits is even.

The product of its digits is 73728, while the sum is 40.

The square root of 82486813 is about 9082.2251128234. The cubic root of 82486813 is about 435.3061886213.

The spelling of 82486813 in words is "eighty-two million, four hundred eighty-six thousand, eight hundred thirteen".