84138719 has 8 divisors (see below), whose sum is σ = 97973280. Its totient is φ = 70757856.

The previous prime is 84138689. The next prime is 84138739. The reversal of 84138719 is 91783148.

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 84138719 - 2¹⁶ = 84073183 is a prime.

It is a super-2 number, since 2×84138719² = 14158648069921922, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (84138739) 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, 113024 + ... + 113765.

It is an arithmetic number, because the mean of its divisors is an integer number (12246660).

Almost surely, 2^84138719 is an apocalyptic number.

84138719 is a deficient number, since it is larger than the sum of its proper divisors (13834561).

84138719 is a wasteful number, since it uses less digits than its factorization.

84138719 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 226849.

The product of its digits is 48384, while the sum is 41.

The square root of 84138719 is about 9172.7160099940. The cubic root of 84138719 is about 438.1928617657.

The spelling of 84138719 in words is "eighty-four million, one hundred thirty-eight thousand, seven hundred nineteen".