6988861 has 4 divisors (see below), whose sum is σ = 7624224. Its totient is φ = 6353500.

The previous prime is 6988847. The next prime is 6988871. The reversal of 6988861 is 1688896.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 6988861 - 2⁵ = 6988829 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6988811) 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, 317665 + ... + 317686.

It is an arithmetic number, because the mean of its divisors is an integer number (1906056).

Almost surely, 2^6988861 is an apocalyptic number.

It is an amenable number.

6988861 is a deficient number, since it is larger than the sum of its proper divisors (635363).

6988861 is a wasteful number, since it uses less digits than its factorization.

6988861 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 635362.

The product of its digits is 165888, while the sum is 46.

The square root of 6988861 is about 2643.6453998220. The cubic root of 6988861 is about 191.1915970730.

It can be divided in two parts, 698 and 8861, that added together give a palindrome (9559).

The spelling of 6988861 in words is "six million, nine hundred eighty-eight thousand, eight hundred sixty-one".