84780331 has 2 divisors, whose sum is σ = 84780332. Its totient is φ = 84780330.

The previous prime is 84780313. The next prime is 84780349. The reversal of 84780331 is 13308748.

Together with previous prime (84780313) it forms an Ormiston pair, because they use the same digits, order apart.

It is a balanced prime because it is at equal distance from previous prime (84780313) and next prime (84780349).

It is a cyclic number.

It is not a de Polignac number, because 84780331 - 2⁷ = 84780203 is a prime.

It is a super-2 number, since 2×84780331² = 14375409048939122, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (84784331) 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, 42390165 + 42390166.

It is an arithmetic number, because the mean of its divisors is an integer number (42390166).

Almost surely, 2^84780331 is an apocalyptic number.

84780331 is a deficient number, since it is larger than the sum of its proper divisors (1).

84780331 is an equidigital number, since it uses as much as digits as its factorization.

84780331 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 16128, while the sum is 34.

The square root of 84780331 is about 9207.6235261874. The cubic root of 84780331 is about 439.3038768628.

The spelling of 84780331 in words is "eighty-four million, seven hundred eighty thousand, three hundred thirty-one".