6819490987 has 8 divisors (see below), whose sum is σ = 6936824880. Its totient is φ = 6702215520.

The previous prime is 6819490981. The next prime is 6819491047. The reversal of 6819490987 is 7890949186.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 6819490987 - 2²³ = 6811102379 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (6819490981) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 267037 + ... + 291457.

It is an arithmetic number, because the mean of its divisors is an integer number (867103110).

Almost surely, 2^6819490987 is an apocalyptic number.

6819490987 is a deficient number, since it is larger than the sum of its proper divisors (117333893).

6819490987 is a wasteful number, since it uses less digits than its factorization.

6819490987 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 29213.

The product of its (nonzero) digits is 7838208, while the sum is 61.

The square root of 6819490987 is about 82580.2094148471. The cubic root of 6819490987 is about 1896.3448646121.

The spelling of 6819490987 in words is "six billion, eight hundred nineteen million, four hundred ninety thousand, nine hundred eighty-seven".