1963890793 has 2 divisors, whose sum is σ = 1963890794. Its totient is φ = 1963890792.

The previous prime is 1963890769. The next prime is 1963890839. The reversal of 1963890793 is 3970983691.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1698428944 + 265461849 = 41212^2 + 16293^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1963890793 is a prime.

It is not a weakly prime, because it can be changed into another prime (1963891793) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 981945396 + 981945397.

It is an arithmetic number, because the mean of its divisors is an integer number (981945397).

Almost surely, 2^1963890793 is an apocalyptic number.

It is an amenable number.

1963890793 is a deficient number, since it is larger than the sum of its proper divisors (1).

1963890793 is an equidigital number, since it uses as much as digits as its factorization.

1963890793 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2204496, while the sum is 55.

The square root of 1963890793 is about 44315.8074844631. The cubic root of 1963890793 is about 1252.2924955078.

The spelling of 1963890793 in words is "one billion, nine hundred sixty-three million, eight hundred ninety thousand, seven hundred ninety-three".