84814789 has 2 divisors, whose sum is σ = 84814790. Its totient is φ = 84814788.

The previous prime is 84814759. The next prime is 84814811. The reversal of 84814789 is 98741848.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 70812225 + 14002564 = 8415^2 + 3742^2 .

It is a cyclic number.

It is not a de Polignac number, because 84814789 - 2⁵ = 84814757 is a prime.

It is a super-2 number, since 2×84814789² = 14387096866229042, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (84814759) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 42407394 + 42407395.

It is an arithmetic number, because the mean of its divisors is an integer number (42407395).

Almost surely, 2^84814789 is an apocalyptic number.

It is an amenable number.

84814789 is a deficient number, since it is larger than the sum of its proper divisors (1).

84814789 is an equidigital number, since it uses as much as digits as its factorization.

84814789 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 516096, while the sum is 49.

The square root of 84814789 is about 9209.4945029573. The cubic root of 84814789 is about 439.3633854873.

The spelling of 84814789 in words is "eighty-four million, eight hundred fourteen thousand, seven hundred eighty-nine".