6913989 has 6 divisors (see below), whose sum is σ = 9986886. Its totient is φ = 4609320.

The previous prime is 6913987. The next prime is 6913993. The reversal of 6913989 is 9893196.

It can be written as a sum of positive squares in only one way, i.e., 5963364 + 950625 = 2442^2 + 975^2 .

It is not a de Polignac number, because 6913989 - 2¹ = 6913987 is a prime.

It is a super-3 number, since 3×6913989³ (a number of 21 digits) contains 333 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6913987) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 384102 + ... + 384119.

It is an arithmetic number, because the mean of its divisors is an integer number (1664481).

Almost surely, 2^6913989 is an apocalyptic number.

It is an amenable number.

6913989 is a deficient number, since it is larger than the sum of its proper divisors (3072897).

6913989 is a wasteful number, since it uses less digits than its factorization.

6913989 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 768227 (or 768224 counting only the distinct ones).

The product of its digits is 104976, while the sum is 45.

The square root of 6913989 is about 2629.4465197071. The cubic root of 6913989 is about 190.5063961314.

The spelling of 6913989 in words is "six million, nine hundred thirteen thousand, nine hundred eighty-nine".