13478957 has 2 divisors, whose sum is σ = 13478958. Its totient is φ = 13478956.

The previous prime is 13478953. The next prime is 13478981. The reversal of 13478957 is 75987431.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 10278436 + 3200521 = 3206^2 + 1789^2 .

It is a cyclic number.

It is not a de Polignac number, because 13478957 - 2² = 13478953 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (13478953) 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, 6739478 + 6739479.

It is an arithmetic number, because the mean of its divisors is an integer number (6739479).

Almost surely, 2^13478957 is an apocalyptic number.

It is an amenable number.

13478957 is a deficient number, since it is larger than the sum of its proper divisors (1).

13478957 is an equidigital number, since it uses as much as digits as its factorization.

13478957 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 211680, while the sum is 44.

The square root of 13478957 is about 3671.3699078137. The cubic root of 13478957 is about 237.9863761238.

The spelling of 13478957 in words is "thirteen million, four hundred seventy-eight thousand, nine hundred fifty-seven".