8379421 has 2 divisors, whose sum is σ = 8379422. Its totient is φ = 8379420.

The previous prime is 8379409. The next prime is 8379461. The reversal of 8379421 is 1249738.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 6320196 + 2059225 = 2514^2 + 1435^2 .

It is a cyclic number.

It is not a de Polignac number, because 8379421 - 2⁵ = 8379389 is a prime.

8379421 is a lucky number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (8379401) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4189710 + 4189711.

It is an arithmetic number, because the mean of its divisors is an integer number (4189711).

Almost surely, 2^8379421 is an apocalyptic number.

It is an amenable number.

8379421 is a deficient number, since it is larger than the sum of its proper divisors (1).

8379421 is an equidigital number, since it uses as much as digits as its factorization.

8379421 is an evil number, because the sum of its binary digits is even.

The product of its digits is 12096, while the sum is 34.

The square root of 8379421 is about 2894.7229573830. The cubic root of 8379421 is about 203.1131322770.

The spelling of 8379421 in words is "eight million, three hundred seventy-nine thousand, four hundred twenty-one".