82497881 has 2 divisors, whose sum is σ = 82497882. Its totient is φ = 82497880.

The previous prime is 82497847. The next prime is 82497893. The reversal of 82497881 is 18879428.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 45104656 + 37393225 = 6716^2 + 6115^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-82497881 is a prime.

It is a super-2 number, since 2×82497881² = 13611800738980322, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (82497581) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 41248940 + 41248941.

It is an arithmetic number, because the mean of its divisors is an integer number (41248941).

Almost surely, 2^82497881 is an apocalyptic number.

It is an amenable number.

82497881 is a deficient number, since it is larger than the sum of its proper divisors (1).

82497881 is an equidigital number, since it uses as much as digits as its factorization.

82497881 is an evil number, because the sum of its binary digits is even.

The product of its digits is 258048, while the sum is 47.

The square root of 82497881 is about 9082.8344144325. The cubic root of 82497881 is about 435.3256574037.

The spelling of 82497881 in words is "eighty-two million, four hundred ninety-seven thousand, eight hundred eighty-one".