6887869631 has 2 divisors, whose sum is σ = 6887869632. Its totient is φ = 6887869630.

The previous prime is 6887869621. The next prime is 6887869657. The reversal of 6887869631 is 1369687886.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 6887869631 - 2³⁰ = 5814127807 is a prime.

It is a super-2 number, since 2×6887869631² = 94885496107304152322, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (6887869621) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3443934815 + 3443934816.

It is an arithmetic number, because the mean of its divisors is an integer number (3443934816).

Almost surely, 2^6887869631 is an apocalyptic number.

6887869631 is a deficient number, since it is larger than the sum of its proper divisors (1).

6887869631 is an equidigital number, since it uses as much as digits as its factorization.

6887869631 is an evil number, because the sum of its binary digits is even.

The product of its digits is 20901888, while the sum is 62.

The square root of 6887869631 is about 82993.1902688407. The cubic root of 6887869631 is about 1902.6619779515.

The spelling of 6887869631 in words is "six billion, eight hundred eighty-seven million, eight hundred sixty-nine thousand, six hundred thirty-one".