13403400349 has 2 divisors, whose sum is σ = 13403400350. Its totient is φ = 13403400348.

The previous prime is 13403400313. The next prime is 13403400401. The reversal of 13403400349 is 94300430431.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 10890383449 + 2513016900 = 104357^2 + 50130^2 .

It is a cyclic number.

It is not a de Polignac number, because 13403400349 - 2²¹ = 13401303197 is a prime.

It is a super-2 number, since 2×13403400349² (a number of 21 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 13403400349.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (13403400449) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6701700174 + 6701700175.

It is an arithmetic number, because the mean of its divisors is an integer number (6701700175).

Almost surely, 2^13403400349 is an apocalyptic number.

It is an amenable number.

13403400349 is a deficient number, since it is larger than the sum of its proper divisors (1).

13403400349 is an equidigital number, since it uses as much as digits as its factorization.

13403400349 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 15552, while the sum is 31.

The spelling of 13403400349 in words is "thirteen billion, four hundred three million, four hundred thousand, three hundred forty-nine".