13518977 has 2 divisors, whose sum is σ = 13518978. Its totient is φ = 13518976.

The previous prime is 13518887. The next prime is 13518979. The reversal of 13518977 is 77981531.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 12418576 + 1100401 = 3524^2 + 1049^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-13518977 is a prime.

Together with 13518979, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (13518979) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6759488 + 6759489.

It is an arithmetic number, because the mean of its divisors is an integer number (6759489).

Almost surely, 2^13518977 is an apocalyptic number.

It is an amenable number.

13518977 is a deficient number, since it is larger than the sum of its proper divisors (1).

13518977 is an equidigital number, since it uses as much as digits as its factorization.

13518977 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 52920, while the sum is 41.

The square root of 13518977 is about 3676.8161498775. The cubic root of 13518977 is about 238.2216763344.

The spelling of 13518977 in words is "thirteen million, five hundred eighteen thousand, nine hundred seventy-seven".