84383989 has 2 divisors, whose sum is σ = 84383990. Its totient is φ = 84383988.

The previous prime is 84383933. The next prime is 84384023. The reversal of 84383989 is 98938348.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 81595089 + 2788900 = 9033^2 + 1670^2 .

It is a cyclic number.

It is not a de Polignac number, because 84383989 - 2⁹ = 84383477 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (84386989) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 42191994 + 42191995.

It is an arithmetic number, because the mean of its divisors is an integer number (42191995).

Almost surely, 2^84383989 is an apocalyptic number.

It is an amenable number.

84383989 is a deficient number, since it is larger than the sum of its proper divisors (1).

84383989 is an equidigital number, since it uses as much as digits as its factorization.

84383989 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1492992, while the sum is 52.

The square root of 84383989 is about 9186.0758215900. The cubic root of 84383989 is about 438.6182358798.

The spelling of 84383989 in words is "eighty-four million, three hundred eighty-three thousand, nine hundred eighty-nine".