7920682387 has 4 divisors (see below), whose sum is σ = 7997582320. Its totient is φ = 7843782456.

The previous prime is 7920682351. The next prime is 7920682411. The reversal of 7920682387 is 7832860297.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 7832860297 = 151 ⋅51873247.

It is a cyclic number.

It is not a de Polignac number, because 7920682387 - 2¹⁵ = 7920649619 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (7920682337) 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, 38449812 + ... + 38450017.

It is an arithmetic number, because the mean of its divisors is an integer number (1999395580).

Almost surely, 2^7920682387 is an apocalyptic number.

7920682387 is a deficient number, since it is larger than the sum of its proper divisors (76899933).

7920682387 is a wasteful number, since it uses less digits than its factorization.

7920682387 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 76899932.

The product of its (nonzero) digits is 2032128, while the sum is 52.

The square root of 7920682387 is about 88998.2156394161. The cubic root of 7920682387 is about 1993.3682330559.

The spelling of 7920682387 in words is "seven billion, nine hundred twenty million, six hundred eighty-two thousand, three hundred eighty-seven".