2978144917 has 8 divisors (see below), whose sum is σ = 3272260320. Its totient is φ = 2687925360.

The previous prime is 2978144893. The next prime is 2978144959. The reversal of 2978144917 is 7194418792.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 2978144917 - 2¹⁹ = 2977620629 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2978144977) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 972358 + ... + 975415.

It is an arithmetic number, because the mean of its divisors is an integer number (409032540).

Almost surely, 2^2978144917 is an apocalyptic number.

It is an amenable number.

2978144917 is a deficient number, since it is larger than the sum of its proper divisors (294115403).

2978144917 is a wasteful number, since it uses less digits than its factorization.

2978144917 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1947923.

The product of its digits is 1016064, while the sum is 52.

The square root of 2978144917 is about 54572.3823650755. The cubic root of 2978144917 is about 1438.7387549855.

The spelling of 2978144917 in words is "two billion, nine hundred seventy-eight million, one hundred forty-four thousand, nine hundred seventeen".