84262238821 has 2 divisors, whose sum is σ = 84262238822. Its totient is φ = 84262238820.

The previous prime is 84262238791. The next prime is 84262238831. The reversal of 84262238821 is 12883226248.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 82621178721 + 1641060100 = 287439^2 + 40510^2 .

It is a cyclic number.

It is not a de Polignac number, because 84262238821 - 2⁷ = 84262238693 is a prime.

It is a super-2 number, since 2×84262238821² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (84262238831) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 42131119410 + 42131119411.

It is an arithmetic number, because the mean of its divisors is an integer number (42131119411).

Almost surely, 2^84262238821 is an apocalyptic number.

It is an amenable number.

84262238821 is a deficient number, since it is larger than the sum of its proper divisors (1).

84262238821 is an equidigital number, since it uses as much as digits as its factorization.

84262238821 is an evil number, because the sum of its binary digits is even.

The product of its digits is 589824, while the sum is 46.

The spelling of 84262238821 in words is "eighty-four billion, two hundred sixty-two million, two hundred thirty-eight thousand, eight hundred twenty-one".