13521667 has 2 divisors, whose sum is σ = 13521668. Its totient is φ = 13521666.

The previous prime is 13521659. The next prime is 13521701. The reversal of 13521667 is 76612531.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 13521667 - 2³ = 13521659 is a prime.

It is not a weakly prime, because it can be changed into another prime (13521617) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6760833 + 6760834.

It is an arithmetic number, because the mean of its divisors is an integer number (6760834).

Almost surely, 2^13521667 is an apocalyptic number.

13521667 is a deficient number, since it is larger than the sum of its proper divisors (1).

13521667 is an equidigital number, since it uses as much as digits as its factorization.

13521667 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 7560, while the sum is 31.

The square root of 13521667 is about 3677.1819372993. The cubic root of 13521667 is about 238.2374757008.

The spelling of 13521667 in words is "thirteen million, five hundred twenty-one thousand, six hundred sixty-seven".