84264779 has 2 divisors, whose sum is σ = 84264780. Its totient is φ = 84264778.

The previous prime is 84264751. The next prime is 84264781. The reversal of 84264779 is 97746248.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 84264779 - 2¹⁶ = 84199243 is a prime.

Together with 84264781, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (84264679) 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, 42132389 + 42132390.

It is an arithmetic number, because the mean of its divisors is an integer number (42132390).

Almost surely, 2^84264779 is an apocalyptic number.

84264779 is a deficient number, since it is larger than the sum of its proper divisors (1).

84264779 is an equidigital number, since it uses as much as digits as its factorization.

84264779 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 84264779 is about 9179.5849034692. The cubic root of 84264779 is about 438.4115919328.

The spelling of 84264779 in words is "eighty-four million, two hundred sixty-four thousand, seven hundred seventy-nine".