420063493 has 2 divisors, whose sum is σ = 420063494. Its totient is φ = 420063492.

The previous prime is 420063473. The next prime is 420063563. The reversal of 420063493 is 394360024.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 342324004 + 77739489 = 18502^2 + 8817^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-420063493 is a prime.

It is a super-2 number, since 2×420063493² = 352906676302722098, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (420063403) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 210031746 + 210031747.

It is an arithmetic number, because the mean of its divisors is an integer number (210031747).

Almost surely, 2^420063493 is an apocalyptic number.

It is an amenable number.

420063493 is a deficient number, since it is larger than the sum of its proper divisors (1).

420063493 is an equidigital number, since it uses as much as digits as its factorization.

420063493 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 15552, while the sum is 31.

The square root of 420063493 is about 20495.4505439622. The cubic root of 420063493 is about 748.9249741993.

The spelling of 420063493 in words is "four hundred twenty million, sixty-three thousand, four hundred ninety-three".