421590479 has 2 divisors, whose sum is σ = 421590480. Its totient is φ = 421590478.

The previous prime is 421590439. The next prime is 421590523. The reversal of 421590479 is 974095124.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-421590479 is a prime.

It is a Sophie Germain prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (421590409) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 210795239 + 210795240.

It is an arithmetic number, because the mean of its divisors is an integer number (210795240).

Almost surely, 2^421590479 is an apocalyptic number.

421590479 is a deficient number, since it is larger than the sum of its proper divisors (1).

421590479 is an equidigital number, since it uses as much as digits as its factorization.

421590479 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 90720, while the sum is 41.

The square root of 421590479 is about 20532.6685796075. The cubic root of 421590479 is about 749.8313570452.

The spelling of 421590479 in words is "four hundred twenty-one million, five hundred ninety thousand, four hundred seventy-nine".