2078639317 has 8 divisors (see below), whose sum is σ = 2260397016. Its totient is φ = 1903491072.

The previous prime is 2078639267. The next prime is 2078639327. The reversal of 2078639317 is 7139368702.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 414488881 + 1664150436 = 20359^2 + 40794^2 .

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 2078639317 - 2¹¹ = 2078637269 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 (2078639327) 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, 1651708 + ... + 1652965.

It is an arithmetic number, because the mean of its divisors is an integer number (282549627).

Almost surely, 2^2078639317 is an apocalyptic number.

It is an amenable number.

2078639317 is a deficient number, since it is larger than the sum of its proper divisors (181757699).

2078639317 is a wasteful number, since it uses less digits than its factorization.

2078639317 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3304727.

The product of its (nonzero) digits is 381024, while the sum is 46.

The square root of 2078639317 is about 45592.0970892983. The cubic root of 2078639317 is about 1276.2224476077. Note that the first 3 decimals are identical.

The spelling of 2078639317 in words is "two billion, seventy-eight million, six hundred thirty-nine thousand, three hundred seventeen".