7847997487 has 16 divisors (see below), whose sum is σ = 9377661600. Its totient is φ = 6483312640.

The previous prime is 7847997473. The next prime is 7847997491.

7847997487 is nontrivially palindromic in base 10.

It is a cyclic number.

It is not a de Polignac number, because 7847997487 - 2⁷ = 7847997359 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 (7847997457) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 718162 + ... + 729007.

It is an arithmetic number, because the mean of its divisors is an integer number (586103850).

Almost surely, 2^7847997487 is an apocalyptic number.

7847997487 is a deficient number, since it is larger than the sum of its proper divisors (1529664113).

7847997487 is a wasteful number, since it uses less digits than its factorization.

7847997487 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1447226.

The product of its digits is 199148544, while the sum is 70.

The square root of 7847997487 is about 88588.9241779129. The cubic root of 7847997487 is about 1987.2520413313.

The spelling of 7847997487 in words is "seven billion, eight hundred forty-seven million, nine hundred ninety-seven thousand, four hundred eighty-seven".