1420644263 has 2 divisors, whose sum is σ = 1420644264. Its totient is φ = 1420644262.

The previous prime is 1420644259. The next prime is 1420644283. The reversal of 1420644263 is 3624460241.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1420644263 - 2² = 1420644259 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1420644233) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 710322131 + 710322132.

It is an arithmetic number, because the mean of its divisors is an integer number (710322132).

Almost surely, 2^1420644263 is an apocalyptic number.

1420644263 is a deficient number, since it is larger than the sum of its proper divisors (1).

1420644263 is an equidigital number, since it uses as much as digits as its factorization.

1420644263 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 27648, while the sum is 32.

The square root of 1420644263 is about 37691.4348758441. The cubic root of 1420644263 is about 1124.1608261723.

The spelling of 1420644263 in words is "one billion, four hundred twenty million, six hundred forty-four thousand, two hundred sixty-three".