1263983935189 has 2 divisors, whose sum is σ = 1263983935190. Its totient is φ = 1263983935188.

The previous prime is 1263983935117. The next prime is 1263983935237. The reversal of 1263983935189 is 9815393893621.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1258109939025 + 5873996164 = 1121655^2 + 76642^2 .

It is an emirp because it is prime and its reverse (9815393893621) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1263983935189 - 2⁷ = 1263983935061 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1263983935789) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 631991967594 + 631991967595.

It is an arithmetic number, because the mean of its divisors is an integer number (631991967595).

Almost surely, 2^{1263983935189} is an apocalyptic number.

It is an amenable number.

1263983935189 is a deficient number, since it is larger than the sum of its proper divisors (1).

1263983935189 is an equidigital number, since it uses as much as digits as its factorization.

1263983935189 is an evil number, because the sum of its binary digits is even.

The product of its digits is 75582720, while the sum is 67.

The spelling of 1263983935189 in words is "one trillion, two hundred sixty-three billion, nine hundred eighty-three million, nine hundred thirty-five thousand, one hundred eighty-nine".