13297978 has 8 divisors (see below), whose sum is σ = 21120372. Its totient is φ = 6257856.

The previous prime is 13297969. The next prime is 13297987. The reversal of 13297978 is 87979231.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (13297969) and next prime (13297987).

It can be written as a sum of positive squares in 2 ways, for example, as 11068929 + 2229049 = 3327^2 + 1493^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is an unprimeable number.

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 in 3 ways as a sum of consecutive naturals, for example, 195525 + ... + 195592.

Almost surely, 2^13297978 is an apocalyptic number.

13297978 is a deficient number, since it is larger than the sum of its proper divisors (7822394).

13297978 is a wasteful number, since it uses less digits than its factorization.

13297978 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 391136.

The product of its digits is 190512, while the sum is 46.

The square root of 13297978 is about 3646.6392747295. The cubic root of 13297978 is about 236.9164428571.

The spelling of 13297978 in words is "thirteen million, two hundred ninety-seven thousand, nine hundred seventy-eight".