7987447897 has 16 divisors (see below), whose sum is σ = 9386395200. Its totient is φ = 6700939200.

The previous prime is 7987447891. The next prime is 7987447903.

7987447897 is nontrivially palindromic in base 10.

It is an interprime number because it is at equal distance from previous prime (7987447891) and next prime (7987447903).

It is a cyclic number.

It is not a de Polignac number, because 7987447897 - 2¹⁵ = 7987415129 is a prime.

It is not an unprimeable number, because it can be changed into a prime (7987447891) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 913854 + ... + 922552.

It is an arithmetic number, because the mean of its divisors is an integer number (586649700).

Almost surely, 2^7987447897 is an apocalyptic number.

It is an amenable number.

7987447897 is a deficient number, since it is larger than the sum of its proper divisors (1398947303).

7987447897 is a wasteful number, since it uses less digits than its factorization.

7987447897 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15144.

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

The square root of 7987447897 is about 89372.5231656800. The cubic root of 7987447897 is about 1998.9534438723.

The spelling of 7987447897 in words is "seven billion, nine hundred eighty-seven million, four hundred forty-seven thousand, eight hundred ninety-seven".