6989771 has 8 divisors (see below), whose sum is σ = 7445520. Its totient is φ = 6539008.

The previous prime is 6989761. The next prime is 6989791. The reversal of 6989771 is 1779896.

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 6989771 - 2²² = 2795467 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (6989761) 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, 1895 + ... + 4191.

It is an arithmetic number, because the mean of its divisors is an integer number (930690).

Almost surely, 2^6989771 is an apocalyptic number.

6989771 is a deficient number, since it is larger than the sum of its proper divisors (455749).

6989771 is a wasteful number, since it uses less digits than its factorization.

6989771 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2493.

The product of its digits is 190512, while the sum is 47.

The square root of 6989771 is about 2643.8175050483. The cubic root of 6989771 is about 191.1998948868.

The spelling of 6989771 in words is "six million, nine hundred eighty-nine thousand, seven hundred seventy-one".