84203881 has 2 divisors, whose sum is σ = 84203882. Its totient is φ = 84203880.

The previous prime is 84203863. The next prime is 84203887. The reversal of 84203881 is 18830248.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 74649600 + 9554281 = 8640^2 + 3091^2 .

It is a cyclic number.

It is not a de Polignac number, because 84203881 - 2⁷ = 84203753 is a prime.

It is a super-2 number, since 2×84203881² = 14180587150924322, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (84203887) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 42101940 + 42101941.

It is an arithmetic number, because the mean of its divisors is an integer number (42101941).

Almost surely, 2^84203881 is an apocalyptic number.

It is an amenable number.

84203881 is a deficient number, since it is larger than the sum of its proper divisors (1).

84203881 is an equidigital number, since it uses as much as digits as its factorization.

84203881 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 12288, while the sum is 34.

The square root of 84203881 is about 9176.2672694293. The cubic root of 84203881 is about 438.3059533981.

The spelling of 84203881 in words is "eighty-four million, two hundred three thousand, eight hundred eighty-one".