Search a number
BaseRepresentation
bin11010101010010001000101
3111011001221000
4122222101011
53242120434
6405443513
7113255466
oct32522105
914131830
106988869
113a43928
122410599
1315a9134
14cdcd6d
15930b99
hex6aa445

6988869 has 8 divisors (see below), whose sum is σ = 10353920. Its totient is φ = 4659228.

The previous prime is 6988847. The next prime is 6988871. The reversal of 6988869 is 9688896.

It is not a de Polignac number, because 6988869 - 29 = 6988357 is a prime.

It is a super-2 number, since 2×69888692 = 97688579798322, which contains 22 as substring.

It is an Ulam number.

6988869 is a strobogrammatic number because it is the same when read upside-down.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6988829) 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, 129397 + ... + 129450.

It is an arithmetic number, because the mean of its divisors is an integer number (1294240).

Almost surely, 26988869 is an apocalyptic number.

It is an amenable number.

6988869 is a deficient number, since it is larger than the sum of its proper divisors (3365051).

6988869 is a wasteful number, since it uses less digits than its factorization.

6988869 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 258856 (or 258850 counting only the distinct ones).

The product of its digits is 1492992, while the sum is 54.

The square root of 6988869 is about 2643.6469128838. The cubic root of 6988869 is about 191.1916700239.

The spelling of 6988869 in words is "six million, nine hundred eighty-eight thousand, eight hundred sixty-nine".

Divisors: 1 3 9 27 258847 776541 2329623 6988869