63862421309 has 2 divisors, whose sum is σ = 63862421310. Its totient is φ = 63862421308.

The previous prime is 63862421303. The next prime is 63862421341. The reversal of 63862421309 is 90312426836.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 56928528409 + 6933892900 = 238597^2 + 83270^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-63862421309 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 63862421309.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (63862421303) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 31931210654 + 31931210655.

It is an arithmetic number, because the mean of its divisors is an integer number (31931210655).

Almost surely, 2^63862421309 is an apocalyptic number.

It is an amenable number.

63862421309 is a deficient number, since it is larger than the sum of its proper divisors (1).

63862421309 is an equidigital number, since it uses as much as digits as its factorization.

63862421309 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 373248, while the sum is 44.

The spelling of 63862421309 in words is "sixty-three billion, eight hundred sixty-two million, four hundred twenty-one thousand, three hundred nine".