421593479 has 2 divisors, whose sum is σ = 421593480. Its totient is φ = 421593478.

The previous prime is 421593463. The next prime is 421593499. The reversal of 421593479 is 974395124.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 421593479 - 2⁴ = 421593463 is a 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 (421593439) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 210796739 + 210796740.

It is an arithmetic number, because the mean of its divisors is an integer number (210796740).

Almost surely, 2^421593479 is an apocalyptic number.

421593479 is a deficient number, since it is larger than the sum of its proper divisors (1).

421593479 is an equidigital number, since it uses as much as digits as its factorization.

421593479 is an evil number, because the sum of its binary digits is even.

The product of its digits is 272160, while the sum is 44.

The square root of 421593479 is about 20532.7416337907. The cubic root of 421593479 is about 749.8331356185.

The spelling of 421593479 in words is "four hundred twenty-one million, five hundred ninety-three thousand, four hundred seventy-nine".