13728479 has 2 divisors, whose sum is σ = 13728480. Its totient is φ = 13728478.

The previous prime is 13728461. The next prime is 13728509. The reversal of 13728479 is 97482731.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 13728479 - 2¹² = 13724383 is a prime.

It is a super-2 number, since 2×13728479² = 376942271306882, which contains 22 as substring.

It is a Sophie Germain prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (13728409) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6864239 + 6864240.

It is an arithmetic number, because the mean of its divisors is an integer number (6864240).

Almost surely, 2^13728479 is an apocalyptic number.

13728479 is a deficient number, since it is larger than the sum of its proper divisors (1).

13728479 is an equidigital number, since it uses as much as digits as its factorization.

13728479 is an evil number, because the sum of its binary digits is even.

The product of its digits is 84672, while the sum is 41.

The square root of 13728479 is about 3705.1962161268. The cubic root of 13728479 is about 239.4459383180.

The spelling of 13728479 in words is "thirteen million, seven hundred twenty-eight thousand, four hundred seventy-nine".