13557977 has 2 divisors, whose sum is σ = 13557978. Its totient is φ = 13557976.

The previous prime is 13557961. The next prime is 13557991. The reversal of 13557977 is 77975531.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 9759376 + 3798601 = 3124^2 + 1949^2 .

It is a cyclic number.

It is not a de Polignac number, because 13557977 - 2⁴ = 13557961 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (13557917) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6778988 + 6778989.

It is an arithmetic number, because the mean of its divisors is an integer number (6778989).

Almost surely, 2^13557977 is an apocalyptic number.

It is an amenable number.

13557977 is a deficient number, since it is larger than the sum of its proper divisors (1).

13557977 is an equidigital number, since it uses as much as digits as its factorization.

13557977 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 231525, while the sum is 44.

The square root of 13557977 is about 3682.1158319640. The cubic root of 13557977 is about 238.4505330415.

The spelling of 13557977 in words is "thirteen million, five hundred fifty-seven thousand, nine hundred seventy-seven".