84642743 has 4 divisors (see below), whose sum is σ = 84689808. Its totient is φ = 84595680.

The previous prime is 84642713. The next prime is 84642769. The reversal of 84642743 is 34724648.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 84642743 - 2¹⁰ = 84641719 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 84642697 and 84642706.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (84642703) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 20723 + ... + 24468.

It is an arithmetic number, because the mean of its divisors is an integer number (21172452).

Almost surely, 2^84642743 is an apocalyptic number.

84642743 is a deficient number, since it is larger than the sum of its proper divisors (47065).

84642743 is a wasteful number, since it uses less digits than its factorization.

84642743 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 47064.

The product of its digits is 129024, while the sum is 38.

The square root of 84642743 is about 9200.1490748792. The cubic root of 84642743 is about 439.0661028896.

The spelling of 84642743 in words is "eighty-four million, six hundred forty-two thousand, seven hundred forty-three".