84406019 has 2 divisors, whose sum is σ = 84406020. Its totient is φ = 84406018.

The previous prime is 84406009. The next prime is 84406039. The reversal of 84406019 is 91060448.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-84406019 is a prime.

It is a super-2 number, since 2×84406019² = 14248752086856722, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (84406009) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 42203009 + 42203010.

It is an arithmetic number, because the mean of its divisors is an integer number (42203010).

Almost surely, 2^84406019 is an apocalyptic number.

84406019 is a deficient number, since it is larger than the sum of its proper divisors (1).

84406019 is an equidigital number, since it uses as much as digits as its factorization.

84406019 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 6912, while the sum is 32.

The square root of 84406019 is about 9187.2748407784. The cubic root of 84406019 is about 438.6564023578.

The spelling of 84406019 in words is "eighty-four million, four hundred six thousand, nineteen".