84219461 has 2 divisors, whose sum is σ = 84219462. Its totient is φ = 84219460.

The previous prime is 84219439. The next prime is 84219463. The reversal of 84219461 is 16491248.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 57851236 + 26368225 = 7606^2 + 5135^2 .

It is a cyclic number.

It is not a de Polignac number, because 84219461 - 2¹⁸ = 83957317 is a prime.

It is a super-2 number, since 2×84219461² = 14185835222261042, which contains 22 as substring.

Together with 84219463, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (84219463) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 42109730 + 42109731.

It is an arithmetic number, because the mean of its divisors is an integer number (42109731).

Almost surely, 2^84219461 is an apocalyptic number.

It is an amenable number.

84219461 is a deficient number, since it is larger than the sum of its proper divisors (1).

84219461 is an equidigital number, since it uses as much as digits as its factorization.

84219461 is an evil number, because the sum of its binary digits is even.

The product of its digits is 13824, while the sum is 35.

The square root of 84219461 is about 9177.1161592300. The cubic root of 84219461 is about 438.3329845577.

The spelling of 84219461 in words is "eighty-four million, two hundred nineteen thousand, four hundred sixty-one".