13097278 has 4 divisors (see below), whose sum is σ = 19645920. Its totient is φ = 6548638.

The previous prime is 13097261. The next prime is 13097291. The reversal of 13097278 is 87279031.

It is a semiprime because it is the product of two primes.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3274318 + ... + 3274321.

It is an arithmetic number, because the mean of its divisors is an integer number (4911480).

Almost surely, 2^13097278 is an apocalyptic number.

13097278 is a deficient number, since it is larger than the sum of its proper divisors (6548642).

13097278 is an equidigital number, since it uses as much as digits as its factorization.

13097278 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6548641.

The product of its (nonzero) digits is 21168, while the sum is 37.

The square root of 13097278 is about 3619.0161646503. The cubic root of 13097278 is about 235.7185071438.

The spelling of 13097278 in words is "thirteen million, ninety-seven thousand, two hundred seventy-eight".