84905419 has 2 divisors, whose sum is σ = 84905420. Its totient is φ = 84905418.

The previous prime is 84905411. The next prime is 84905477. The reversal of 84905419 is 91450948.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 84905419 - 2³ = 84905411 is a prime.

It is a super-2 number, since 2×84905419² = 14417860351131122, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (84905411) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 42452709 + 42452710.

It is an arithmetic number, because the mean of its divisors is an integer number (42452710).

Almost surely, 2^84905419 is an apocalyptic number.

84905419 is a deficient number, since it is larger than the sum of its proper divisors (1).

84905419 is an equidigital number, since it uses as much as digits as its factorization.

84905419 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 51840, while the sum is 40.

The square root of 84905419 is about 9214.4136547042. The cubic root of 84905419 is about 439.5198256918.

The spelling of 84905419 in words is "eighty-four million, nine hundred five thousand, four hundred nineteen".