12920897 has 4 divisors (see below), whose sum is σ = 14095536. Its totient is φ = 11746260.

The previous prime is 12920861. The next prime is 12920903. The reversal of 12920897 is 79802921.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-12920897 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 12920897.

It is not an unprimeable number, because it can be changed into a prime (12920827) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 587303 + ... + 587324.

It is an arithmetic number, because the mean of its divisors is an integer number (3523884).

Almost surely, 2^12920897 is an apocalyptic number.

It is an amenable number.

12920897 is a deficient number, since it is larger than the sum of its proper divisors (1174639).

12920897 is a wasteful number, since it uses less digits than its factorization.

12920897 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1174638.

The product of its (nonzero) digits is 18144, while the sum is 38.

The square root of 12920897 is about 3594.5649249944. The cubic root of 12920897 is about 234.6555811722.

The spelling of 12920897 in words is "twelve million, nine hundred twenty thousand, eight hundred ninety-seven".