84837421 has 4 divisors (see below), whose sum is σ = 87574144. Its totient is φ = 82100700.

The previous prime is 84837419. The next prime is 84837427. The reversal of 84837421 is 12473848.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 84837421 - 2¹ = 84837419 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (84837427) 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, 1368315 + ... + 1368376.

It is an arithmetic number, because the mean of its divisors is an integer number (21893536).

Almost surely, 2^84837421 is an apocalyptic number.

It is an amenable number.

84837421 is a deficient number, since it is larger than the sum of its proper divisors (2736723).

84837421 is a wasteful number, since it uses less digits than its factorization.

84837421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2736722.

The product of its digits is 43008, while the sum is 37.

The square root of 84837421 is about 9210.7231529343. The cubic root of 84837421 is about 439.4024619578.

It can be divided in two parts, 84837 and 421, that added together give a palindrome (85258).

The spelling of 84837421 in words is "eighty-four million, eight hundred thirty-seven thousand, four hundred twenty-one".