13679358421 has 2 divisors, whose sum is σ = 13679358422. Its totient is φ = 13679358420.

The previous prime is 13679358331. The next prime is 13679358461. The reversal of 13679358421 is 12485397631.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 13539882321 + 139476100 = 116361^2 + 11810^2 .

It is a cyclic number.

It is not a de Polignac number, because 13679358421 - 2¹¹ = 13679356373 is a prime.

It is a super-2 number, since 2×13679358421² (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 (13679358461) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6839679210 + 6839679211.

It is an arithmetic number, because the mean of its divisors is an integer number (6839679211).

Almost surely, 2^13679358421 is an apocalyptic number.

It is an amenable number.

13679358421 is a deficient number, since it is larger than the sum of its proper divisors (1).

13679358421 is an equidigital number, since it uses as much as digits as its factorization.

13679358421 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1088640, while the sum is 49.

It can be divided in two parts, 13679 and 358421, that added together give a square (372100 = 610²).

The spelling of 13679358421 in words is "thirteen billion, six hundred seventy-nine million, three hundred fifty-eight thousand, four hundred twenty-one".