84462779 has 2 divisors, whose sum is σ = 84462780. Its totient is φ = 84462778.

The previous prime is 84462767. The next prime is 84462797. The reversal of 84462779 is 97726448.

Together with next prime (84462797) it forms an Ormiston pair, because they use the same digits, order apart.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 84462779 - 2²⁰ = 83414203 is a prime.

It is a super-2 number, since 2×84462779² = 14267922072805682, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (84462479) 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, 42231389 + 42231390.

It is an arithmetic number, because the mean of its divisors is an integer number (42231390).

Almost surely, 2^84462779 is an apocalyptic number.

84462779 is a deficient number, since it is larger than the sum of its proper divisors (1).

84462779 is an equidigital number, since it uses as much as digits as its factorization.

84462779 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 677376, while the sum is 47.

The square root of 84462779 is about 9190.3633769291. The cubic root of 84462779 is about 438.7547071894.

The spelling of 84462779 in words is "eighty-four million, four hundred sixty-two thousand, seven hundred seventy-nine".