84742239 has 8 divisors (see below), whose sum is σ = 113311152. Its totient is φ = 56334080.

The previous prime is 84742219. The next prime is 84742267. The reversal of 84742239 is 93224748.

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 84742239 - 2²⁰ = 83693663 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 84742197 and 84742206.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (84742219) 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, 38952 + ... + 41069.

It is an arithmetic number, because the mean of its divisors is an integer number (14163894).

Almost surely, 2^84742239 is an apocalyptic number.

84742239 is a deficient number, since it is larger than the sum of its proper divisors (28568913).

84742239 is a wasteful number, since it uses less digits than its factorization.

84742239 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 80377.

The product of its digits is 96768, while the sum is 39.

The square root of 84742239 is about 9205.5547904513. The cubic root of 84742239 is about 439.2380735886.

The spelling of 84742239 in words is "eighty-four million, seven hundred forty-two thousand, two hundred thirty-nine".