420036709 has 2 divisors, whose sum is σ = 420036710. Its totient is φ = 420036708.

The previous prime is 420036647. The next prime is 420036737. The reversal of 420036709 is 907630024.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 340291809 + 79744900 = 18447^2 + 8930^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-420036709 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 (420036769) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 210018354 + 210018355.

It is an arithmetic number, because the mean of its divisors is an integer number (210018355).

Almost surely, 2^420036709 is an apocalyptic number.

It is an amenable number.

420036709 is a deficient number, since it is larger than the sum of its proper divisors (1).

420036709 is an equidigital number, since it uses as much as digits as its factorization.

420036709 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 9072, while the sum is 31.

The square root of 420036709 is about 20494.7971202449. The cubic root of 420036709 is about 748.9090562621.

The spelling of 420036709 in words is "four hundred twenty million, thirty-six thousand, seven hundred nine".