13680949 has 2 divisors, whose sum is σ = 13680950. Its totient is φ = 13680948.

The previous prime is 13680941. The next prime is 13681033. The reversal of 13680949 is 94908631.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 9878449 + 3802500 = 3143^2 + 1950^2 .

It is a cyclic number.

It is not a de Polignac number, because 13680949 - 2³ = 13680941 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (13680941) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6840474 + 6840475.

It is an arithmetic number, because the mean of its divisors is an integer number (6840475).

Almost surely, 2^13680949 is an apocalyptic number.

It is an amenable number.

13680949 is a deficient number, since it is larger than the sum of its proper divisors (1).

13680949 is an equidigital number, since it uses as much as digits as its factorization.

13680949 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 46656, while the sum is 40.

The square root of 13680949 is about 3698.7766896638. The cubic root of 13680949 is about 239.1692865287.

The spelling of 13680949 in words is "thirteen million, six hundred eighty thousand, nine hundred forty-nine".