421044779 has 2 divisors, whose sum is σ = 421044780. Its totient is φ = 421044778.

The previous prime is 421044749. The next prime is 421044791. The reversal of 421044779 is 977440124.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 421044779 - 2⁸ = 421044523 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (421044749) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 210522389 + 210522390.

It is an arithmetic number, because the mean of its divisors is an integer number (210522390).

Almost surely, 2^421044779 is an apocalyptic number.

421044779 is a deficient number, since it is larger than the sum of its proper divisors (1).

421044779 is an equidigital number, since it uses as much as digits as its factorization.

421044779 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 56448, while the sum is 38.

The square root of 421044779 is about 20519.3756971307. The cubic root of 421044779 is about 749.5076941024.

The spelling of 421044779 in words is "four hundred twenty-one million, forty-four thousand, seven hundred seventy-nine".