420709811 has 4 divisors (see below), whose sum is σ = 421289232. Its totient is φ = 420130392.

The previous prime is 420709801. The next prime is 420709823. The reversal of 420709811 is 118907024.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 420709811 - 2⁶ = 420709747 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (420709801) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 288620 + ... + 290073.

It is an arithmetic number, because the mean of its divisors is an integer number (105322308).

Almost surely, 2^420709811 is an apocalyptic number.

420709811 is a deficient number, since it is larger than the sum of its proper divisors (579421).

420709811 is an equidigital number, since it uses as much as digits as its factorization.

420709811 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 579420.

The product of its (nonzero) digits is 4032, while the sum is 32.

The square root of 420709811 is about 20511.2118364567. The cubic root of 420709811 is about 749.3088809646.

The spelling of 420709811 in words is "four hundred twenty million, seven hundred nine thousand, eight hundred eleven".