84219677 has 2 divisors, whose sum is σ = 84219678. Its totient is φ = 84219676.

The previous prime is 84219661. The next prime is 84219697. The reversal of 84219677 is 77691248.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 44542276 + 39677401 = 6674^2 + 6299^2 .

It is a cyclic number.

It is not a de Polignac number, because 84219677 - 2⁴ = 84219661 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (84219637) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 42109838 + 42109839.

It is an arithmetic number, because the mean of its divisors is an integer number (42109839).

Almost surely, 2^84219677 is an apocalyptic number.

It is an amenable number.

84219677 is a deficient number, since it is larger than the sum of its proper divisors (1).

84219677 is an equidigital number, since it uses as much as digits as its factorization.

84219677 is an evil number, because the sum of its binary digits is even.

The product of its digits is 169344, while the sum is 44.

The square root of 84219677 is about 9177.1279276253. The cubic root of 84219677 is about 438.3333592923. Note that the first 4 decimals are identical.

The spelling of 84219677 in words is "eighty-four million, two hundred nineteen thousand, six hundred seventy-seven".