6987769 has 2 divisors, whose sum is σ = 6987770. Its totient is φ = 6987768.

The previous prime is 6987767. The next prime is 6987793. The reversal of 6987769 is 9677896.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 6827769 + 160000 = 2613^2 + 400^2 .

It is a cyclic number.

It is not a de Polignac number, because 6987769 - 2¹ = 6987767 is a prime.

It is a super-2 number, since 2×6987769² = 97657831194722, which contains 22 as substring.

Together with 6987767, it forms a pair of twin primes.

It is an Ulam number.

It is not a weakly prime, because it can be changed into another prime (6987767) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3493884 + 3493885.

It is an arithmetic number, because the mean of its divisors is an integer number (3493885).

Almost surely, 2^6987769 is an apocalyptic number.

It is an amenable number.

6987769 is a deficient number, since it is larger than the sum of its proper divisors (1).

6987769 is an equidigital number, since it uses as much as digits as its factorization.

6987769 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1143072, while the sum is 52.

The square root of 6987769 is about 2643.4388587596. The cubic root of 6987769 is about 191.1816387455.

The spelling of 6987769 in words is "six million, nine hundred eighty-seven thousand, seven hundred sixty-nine".