82877881 has 2 divisors, whose sum is σ = 82877882. Its totient is φ = 82877880.

The previous prime is 82877869. The next prime is 82877887. The reversal of 82877881 is 18877828.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 69039481 + 13838400 = 8309^2 + 3720^2 .

It is a cyclic number.

It is not a de Polignac number, because 82877881 - 2⁹ = 82877369 is a prime.

It is a super-2 number, since 2×82877881² = 13737486318100322, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (82877887) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 41438940 + 41438941.

It is an arithmetic number, because the mean of its divisors is an integer number (41438941).

Almost surely, 2^82877881 is an apocalyptic number.

It is an amenable number.

82877881 is a deficient number, since it is larger than the sum of its proper divisors (1).

82877881 is an equidigital number, since it uses as much as digits as its factorization.

82877881 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 401408, while the sum is 49.

The square root of 82877881 is about 9103.7289612554. The cubic root of 82877881 is about 435.9930297261.

The spelling of 82877881 in words is "eighty-two million, eight hundred seventy-seven thousand, eight hundred eighty-one".