6902991 has 6 divisors (see below), whose sum is σ = 9971000. Its totient is φ = 4601988.

The previous prime is 6902989. The next prime is 6903007. The reversal of 6902991 is 1992096.

It is not a de Polignac number, because 6902991 - 2¹ = 6902989 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 (6902911) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 383491 + ... + 383508.

Almost surely, 2^6902991 is an apocalyptic number.

6902991 is a deficient number, since it is larger than the sum of its proper divisors (3068009).

6902991 is a wasteful number, since it uses less digits than its factorization.

6902991 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 767005 (or 767002 counting only the distinct ones).

The product of its (nonzero) digits is 8748, while the sum is 36.

The square root of 6902991 is about 2627.3543727484. The cubic root of 6902991 is about 190.4053304389.

The spelling of 6902991 in words is "six million, nine hundred two thousand, nine hundred ninety-one".