13775803949 has 2 divisors, whose sum is σ = 13775803950. Its totient is φ = 13775803948.

The previous prime is 13775803913. The next prime is 13775803969. The reversal of 13775803949 is 94930857731.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 13596726025 + 179077924 = 116605^2 + 13382^2 .

It is a cyclic number.

It is not a de Polignac number, because 13775803949 - 2¹² = 13775799853 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 13775803894 and 13775803903.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (13775803969) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6887901974 + 6887901975.

It is an arithmetic number, because the mean of its divisors is an integer number (6887901975).

Almost surely, 2^13775803949 is an apocalyptic number.

It is an amenable number.

13775803949 is a deficient number, since it is larger than the sum of its proper divisors (1).

13775803949 is an equidigital number, since it uses as much as digits as its factorization.

13775803949 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 5715360, while the sum is 56.

The spelling of 13775803949 in words is "thirteen billion, seven hundred seventy-five million, eight hundred three thousand, nine hundred forty-nine".