420503507 has 2 divisors, whose sum is σ = 420503508. Its totient is φ = 420503506.

The previous prime is 420503471. The next prime is 420503513. The reversal of 420503507 is 705305024.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 420503507 - 2¹² = 420499411 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (420503527) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 210251753 + 210251754.

It is an arithmetic number, because the mean of its divisors is an integer number (210251754).

Almost surely, 2^420503507 is an apocalyptic number.

420503507 is a deficient number, since it is larger than the sum of its proper divisors (1).

420503507 is an equidigital number, since it uses as much as digits as its factorization.

420503507 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 4200, while the sum is 26.

The square root of 420503507 is about 20506.1821653861. The cubic root of 420503507 is about 749.1863810923.

The spelling of 420503507 in words is "four hundred twenty million, five hundred three thousand, five hundred seven".