7897667987 has 32 divisors (see below), whose sum is σ = 9200839680. Its totient is φ = 6708240000.

The previous prime is 7897667963. The next prime is 7897668001.

7897667987 is nontrivially palindromic in base 10.

It is not a de Polignac number, because 7897667987 - 2²⁰ = 7896619411 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (7897667087) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 2328689 + ... + 2332077.

It is an arithmetic number, because the mean of its divisors is an integer number (287526240).

Almost surely, 2^7897667987 is an apocalyptic number.

7897667987 is a deficient number, since it is larger than the sum of its proper divisors (1303171693).

7897667987 is a wasteful number, since it uses less digits than its factorization.

7897667987 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3635.

The product of its digits is 448084224, while the sum is 74.

The square root of 7897667987 is about 88868.8246068327. The cubic root of 7897667987 is about 1991.4357110747.

The spelling of 7897667987 in words is "seven billion, eight hundred ninety-seven million, six hundred sixty-seven thousand, nine hundred eighty-seven".