84312019 has 8 divisors (see below), whose sum is σ = 95148720. Its totient is φ = 74004000.

The previous prime is 84312017. The next prime is 84312023. The reversal of 84312019 is 91021348.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 84312019 - 2¹ = 84312017 is a prime.

It is a super-2 number, since 2×84312019² = 14217033095712722, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (84312017) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 131832 + ... + 132469.

It is an arithmetic number, because the mean of its divisors is an integer number (11893590).

Almost surely, 2^84312019 is an apocalyptic number.

84312019 is a deficient number, since it is larger than the sum of its proper divisors (10836701).

84312019 is a wasteful number, since it uses less digits than its factorization.

84312019 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 264341.

The product of its (nonzero) digits is 1728, while the sum is 28.

The square root of 84312019 is about 9182.1576440399. The cubic root of 84312019 is about 438.4935031609.

The spelling of 84312019 in words is "eighty-four million, three hundred twelve thousand, nineteen".