420293507 has 2 divisors, whose sum is σ = 420293508. Its totient is φ = 420293506.

The previous prime is 420293473. The next prime is 420293519. The reversal of 420293507 is 705392024.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-420293507 is a prime.

It is not a weakly prime, because it can be changed into another prime (420293527) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 210146753 + 210146754.

It is an arithmetic number, because the mean of its divisors is an integer number (210146754).

Almost surely, 2^420293507 is an apocalyptic number.

420293507 is a deficient number, since it is larger than the sum of its proper divisors (1).

420293507 is an equidigital number, since it uses as much as digits as its factorization.

420293507 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 15120, while the sum is 32.

The square root of 420293507 is about 20501.0611188787. The cubic root of 420293507 is about 749.0616454402.

The spelling of 420293507 in words is "four hundred twenty million, two hundred ninety-three thousand, five hundred seven".