84742387 has 4 divisors (see below), whose sum is σ = 84820320. Its totient is φ = 84664456.

The previous prime is 84742351. The next prime is 84742397. The reversal of 84742387 is 78324748.

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 84742387 - 2²³ = 76353779 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (84742397) 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, 37312 + ... + 39517.

It is an arithmetic number, because the mean of its divisors is an integer number (21205080).

Almost surely, 2^84742387 is an apocalyptic number.

84742387 is a deficient number, since it is larger than the sum of its proper divisors (77933).

84742387 is a wasteful number, since it uses less digits than its factorization.

84742387 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 77932.

The product of its digits is 301056, while the sum is 43.

The square root of 84742387 is about 9205.5628290724. The cubic root of 84742387 is about 439.2383292942.

It can be divided in two parts, 847 and 42387, that added together give a palindrome (43234).

The spelling of 84742387 in words is "eighty-four million, seven hundred forty-two thousand, three hundred eighty-seven".