84634421 has 6 divisors (see below), whose sum is σ = 85082166. Its totient is φ = 84189000.

The previous prime is 84634409. The next prime is 84634463. The reversal of 84634421 is 12443648.

It can be written as a sum of positive squares in only one way, i.e., 54538225 + 30096196 = 7385^2 + 5486^2 .

It is a de Polignac number, because none of the positive numbers 2^k-84634421 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 (84634471) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 43571 + ... + 45471.

It is an arithmetic number, because the mean of its divisors is an integer number (14180361).

Almost surely, 2^84634421 is an apocalyptic number.

It is an amenable number.

84634421 is a deficient number, since it is larger than the sum of its proper divisors (447745).

84634421 is an equidigital number, since it uses as much as digits as its factorization.

84634421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2323 (or 2112 counting only the distinct ones).

The product of its digits is 18432, while the sum is 32.

The square root of 84634421 is about 9199.6967884817. The cubic root of 84634421 is about 439.0517128870.

The spelling of 84634421 in words is "eighty-four million, six hundred thirty-four thousand, four hundred twenty-one".