84049919 has 2 divisors, whose sum is σ = 84049920. Its totient is φ = 84049918.

The previous prime is 84049873. The next prime is 84049943. The reversal of 84049919 is 91994048.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 84049919 - 2²⁴ = 67272703 is a prime.

It is a super-2 number, since 2×84049919² = 14128777767813122, which contains 22 as substring.

It is a Sophie Germain prime.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 84049919.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (84049969) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 42024959 + 42024960.

It is an arithmetic number, because the mean of its divisors is an integer number (42024960).

Almost surely, 2^84049919 is an apocalyptic number.

84049919 is a deficient number, since it is larger than the sum of its proper divisors (1).

84049919 is an equidigital number, since it uses as much as digits as its factorization.

84049919 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 93312, while the sum is 44.

The square root of 84049919 is about 9167.8742901504. The cubic root of 84049919 is about 438.0386512599.

The spelling of 84049919 in words is "eighty-four million, forty-nine thousand, nine hundred nineteen".