13043475749 has 2 divisors, whose sum is σ = 13043475750. Its totient is φ = 13043475748.

The previous prime is 13043475733. The next prime is 13043475779. The reversal of 13043475749 is 94757434031.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 9710722849 + 3332752900 = 98543^2 + 57730^2 .

It is a cyclic number.

It is not a de Polignac number, because 13043475749 - 2⁴ = 13043475733 is a prime.

It is a super-2 number, since 2×13043475749² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (13043475779) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6521737874 + 6521737875.

It is an arithmetic number, because the mean of its divisors is an integer number (6521737875).

Almost surely, 2^13043475749 is an apocalyptic number.

It is an amenable number.

13043475749 is a deficient number, since it is larger than the sum of its proper divisors (1).

13043475749 is an equidigital number, since it uses as much as digits as its factorization.

13043475749 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1270080, while the sum is 47.

The spelling of 13043475749 in words is "thirteen billion, forty-three million, four hundred seventy-five thousand, seven hundred forty-nine".