84628978319 has 2 divisors, whose sum is σ = 84628978320. Its totient is φ = 84628978318.

The previous prime is 84628978297. The next prime is 84628978351. The reversal of 84628978319 is 91387982648.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 84628978319 - 2¹² = 84628974223 is a prime.

It is a super-2 number, since 2×84628978319² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (84628978919) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 42314489159 + 42314489160.

It is an arithmetic number, because the mean of its divisors is an integer number (42314489160).

Almost surely, 2^84628978319 is an apocalyptic number.

84628978319 is a deficient number, since it is larger than the sum of its proper divisors (1).

84628978319 is an equidigital number, since it uses as much as digits as its factorization.

84628978319 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 41803776, while the sum is 65.

The spelling of 84628978319 in words is "eighty-four billion, six hundred twenty-eight million, nine hundred seventy-eight thousand, three hundred nineteen".