2278047697 has 4 divisors (see below), whose sum is σ = 2278176676. Its totient is φ = 2277918720.

The previous prime is 2278047691. The next prime is 2278047703. The reversal of 2278047697 is 7967408722.

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

It is an interprime number because it is at equal distance from previous prime (2278047691) and next prime (2278047703).

It can be written as a sum of positive squares in 2 ways, for example, as 1181709376 + 1096338321 = 34376^2 + 33111^2 .

It is a cyclic number.

It is not a de Polignac number, because 2278047697 - 2³ = 2278047689 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2278047691) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 32808 + ... + 75049.

It is an arithmetic number, because the mean of its divisors is an integer number (569544169).

Almost surely, 2^2278047697 is an apocalyptic number.

It is an amenable number.

2278047697 is a deficient number, since it is larger than the sum of its proper divisors (128979).

2278047697 is a wasteful number, since it uses less digits than its factorization.

2278047697 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 128978.

The product of its (nonzero) digits is 2370816, while the sum is 52.

The square root of 2278047697 is about 47728.8979235850. The cubic root of 2278047697 is about 1315.7930990419.

The spelling of 2278047697 in words is "two billion, two hundred seventy-eight million, forty-seven thousand, six hundred ninety-seven".