420023017 has 2 divisors, whose sum is σ = 420023018. Its totient is φ = 420023016.

The previous prime is 420022969. The next prime is 420023057. The reversal of 420023017 is 710320024.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 335768976 + 84254041 = 18324^2 + 9179^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-420023017 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 420022985 and 420023003.

It is not a weakly prime, because it can be changed into another prime (420023057) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 210011508 + 210011509.

It is an arithmetic number, because the mean of its divisors is an integer number (210011509).

Almost surely, 2^420023017 is an apocalyptic number.

It is an amenable number.

420023017 is a deficient number, since it is larger than the sum of its proper divisors (1).

420023017 is an equidigital number, since it uses as much as digits as its factorization.

420023017 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 336, while the sum is 19.

The square root of 420023017 is about 20494.4630815252. The cubic root of 420023017 is about 748.9009187399.

The spelling of 420023017 in words is "four hundred twenty million, twenty-three thousand, seventeen".