13404431357 has 2 divisors, whose sum is σ = 13404431358. Its totient is φ = 13404431356.

The previous prime is 13404431333. The next prime is 13404431389. The reversal of 13404431357 is 75313440431.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 13009455481 + 394975876 = 114059^2 + 19874^2 .

It is a cyclic number.

It is not a de Polignac number, because 13404431357 - 2¹² = 13404427261 is a prime.

It is a super-2 number, since 2×13404431357² (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 (13404431317) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6702215678 + 6702215679.

It is an arithmetic number, because the mean of its divisors is an integer number (6702215679).

Almost surely, 2^13404431357 is an apocalyptic number.

It is an amenable number.

13404431357 is a deficient number, since it is larger than the sum of its proper divisors (1).

13404431357 is an equidigital number, since it uses as much as digits as its factorization.

13404431357 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 60480, while the sum is 35.

Adding to 13404431357 its reverse (75313440431), we get a palindrome (88717871788).

The spelling of 13404431357 in words is "thirteen billion, four hundred four million, four hundred thirty-one thousand, three hundred fifty-seven".