63961019 has 2 divisors, whose sum is σ = 63961020. Its totient is φ = 63961018.

The previous prime is 63961013. The next prime is 63961039. The reversal of 63961019 is 91016936.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 63961019 - 2⁸ = 63960763 is a prime.

It is a super-2 number, since 2×63961019² = 8182023903036722, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 63961019.

It is not a weakly prime, because it can be changed into another prime (63961013) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 31980509 + 31980510.

It is an arithmetic number, because the mean of its divisors is an integer number (31980510).

Almost surely, 2^63961019 is an apocalyptic number.

63961019 is a deficient number, since it is larger than the sum of its proper divisors (1).

63961019 is an equidigital number, since it uses as much as digits as its factorization.

63961019 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 8748, while the sum is 35.

The square root of 63961019 is about 7997.5633164108. The cubic root of 63961019 is about 399.9187730899.

The spelling of 63961019 in words is "sixty-three million, nine hundred sixty-one thousand, nineteen".