6170987989 has 4 divisors (see below), whose sum is σ = 6172746124. Its totient is φ = 6169229856.

The previous prime is 6170987959. The next prime is 6170987993. The reversal of 6170987989 is 9897890716.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 3368873764 + 2802114225 = 58042^2 + 52935^2 .

It is a cyclic number.

It is not a de Polignac number, because 6170987989 - 2⁷ = 6170987861 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 6170987989.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6170987939) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 873792 + ... + 880825.

It is an arithmetic number, because the mean of its divisors is an integer number (1543186531).

Almost surely, 2^6170987989 is an apocalyptic number.

It is an amenable number.

6170987989 is a deficient number, since it is larger than the sum of its proper divisors (1758135).

6170987989 is a wasteful number, since it uses less digits than its factorization.

6170987989 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1758134.

The product of its (nonzero) digits is 13716864, while the sum is 64.

The square root of 6170987989 is about 78555.6362650065. The cubic root of 6170987989 is about 1834.2206015731.

The spelling of 6170987989 in words is "six billion, one hundred seventy million, nine hundred eighty-seven thousand, nine hundred eighty-nine".