421710709 has 6 divisors (see below), whose sum is σ = 490561494. Its totient is φ = 361466280.

The previous prime is 421710703. The next prime is 421710767. The reversal of 421710709 is 907017124.

It can be written as a sum of positive squares in only one way, i.e., 275228100 + 146482609 = 16590^2 + 12103^2 .

It is not a de Polignac number, because 421710709 - 2⁷ = 421710581 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (421710703) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 4303122 + ... + 4303219.

It is an arithmetic number, because the mean of its divisors is an integer number (81760249).

Almost surely, 2^421710709 is an apocalyptic number.

421710709 is a gapful number since it is divisible by the number (49) formed by its first and last digit.

It is an amenable number.

421710709 is a deficient number, since it is larger than the sum of its proper divisors (68850785).

421710709 is an equidigital number, since it uses as much as digits as its factorization.

421710709 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8606355 (or 8606348 counting only the distinct ones).

The product of its (nonzero) digits is 3528, while the sum is 31.

The square root of 421710709 is about 20535.5961442564. The cubic root of 421710709 is about 749.9026297296.

The spelling of 421710709 in words is "four hundred twenty-one million, seven hundred ten thousand, seven hundred nine".