84121347 has 4 divisors (see below), whose sum is σ = 112161800. Its totient is φ = 56080896.

The previous prime is 84121319. The next prime is 84121357. The reversal of 84121347 is 74312148.

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

It is not a de Polignac number, because 84121347 - 2⁶ = 84121283 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (84121307) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 14020222 + ... + 14020227.

It is an arithmetic number, because the mean of its divisors is an integer number (28040450).

Almost surely, 2^84121347 is an apocalyptic number.

84121347 is a deficient number, since it is larger than the sum of its proper divisors (28040453).

84121347 is a wasteful number, since it uses less digits than its factorization.

84121347 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28040452.

The product of its digits is 5376, while the sum is 30.

The square root of 84121347 is about 9171.7690223860. The cubic root of 84121347 is about 438.1627020071.

The spelling of 84121347 in words is "eighty-four million, one hundred twenty-one thousand, three hundred forty-seven".