13575949 has 2 divisors, whose sum is σ = 13575950. Its totient is φ = 13575948.

The previous prime is 13575943. The next prime is 13575983. The reversal of 13575949 is 94957531.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 12299049 + 1276900 = 3507^2 + 1130^2 .

It is a cyclic number.

It is not a de Polignac number, because 13575949 - 2¹⁷ = 13444877 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (13575943) 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, 6787974 + 6787975.

It is an arithmetic number, because the mean of its divisors is an integer number (6787975).

Almost surely, 2^13575949 is an apocalyptic number.

It is an amenable number.

13575949 is a deficient number, since it is larger than the sum of its proper divisors (1).

13575949 is an equidigital number, since it uses as much as digits as its factorization.

13575949 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 170100, while the sum is 43.

The square root of 13575949 is about 3684.5554684385. Note that the first 3 decimals coincide. The cubic root of 13575949 is about 238.5558472004. Note that the first 3 decimals are identical.

The spelling of 13575949 in words is "thirteen million, five hundred seventy-five thousand, nine hundred forty-nine".