6990915 has 8 divisors (see below), whose sum is σ = 11185488. Its totient is φ = 3728480.

The previous prime is 6990913. The next prime is 6990923. The reversal of 6990915 is 5190996.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 6990915 - 2¹ = 6990913 is a prime.

It is not an unprimeable number, because it can be changed into a prime (6990911) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 233016 + ... + 233045.

It is an arithmetic number, because the mean of its divisors is an integer number (1398186).

Almost surely, 2^6990915 is an apocalyptic number.

6990915 is a deficient number, since it is larger than the sum of its proper divisors (4194573).

6990915 is a wasteful number, since it uses less digits than its factorization.

6990915 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 466069.

The product of its (nonzero) digits is 21870, while the sum is 39.

The square root of 6990915 is about 2644.0338500102. The cubic root of 6990915 is about 191.2103254025.

The spelling of 6990915 in words is "six million, nine hundred ninety thousand, nine hundred fifteen".