84814381 has 2 divisors, whose sum is σ = 84814382. Its totient is φ = 84814380.

The previous prime is 84814337. The next prime is 84814391. The reversal of 84814381 is 18341848.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 67798756 + 17015625 = 8234^2 + 4125^2 .

It is a cyclic number.

It is not a de Polignac number, because 84814381 - 2¹⁹ = 84290093 is a prime.

It is a super-2 number, since 2×84814381² = 14386958448826322, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 84814381.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (84814391) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 42407190 + 42407191.

It is an arithmetic number, because the mean of its divisors is an integer number (42407191).

Almost surely, 2^84814381 is an apocalyptic number.

It is an amenable number.

84814381 is a deficient number, since it is larger than the sum of its proper divisors (1).

84814381 is an equidigital number, since it uses as much as digits as its factorization.

84814381 is an evil number, because the sum of its binary digits is even.

The product of its digits is 24576, while the sum is 37.

The square root of 84814381 is about 9209.4723518777. The cubic root of 84814381 is about 439.3626809696.

The spelling of 84814381 in words is "eighty-four million, eight hundred fourteen thousand, three hundred eighty-one".