6990505 has 16 divisors (see below), whose sum is σ = 8864640. Its totient is φ = 5281408.

The previous prime is 6990493. The next prime is 6990517. The reversal of 6990505 is 5050996.

6990505 is nontrivially palindromic in base 4.

It is an interprime number because it is at equal distance from previous prime (6990493) and next prime (6990517).

It is a cyclic number.

It is not a de Polignac number, because 6990505 - 2¹⁵ = 6957737 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 9894 + ... + 10576.

It is an arithmetic number, because the mean of its divisors is an integer number (554040).

Almost surely, 2^6990505 is an apocalyptic number.

It is an amenable number.

6990505 is a deficient number, since it is larger than the sum of its proper divisors (1874135).

6990505 is a wasteful number, since it uses less digits than its factorization.

6990505 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 800.

The product of its (nonzero) digits is 12150, while the sum is 34.

The square root of 6990505 is about 2643.9563158267. The cubic root of 6990505 is about 191.2065873240.

The spelling of 6990505 in words is "six million, nine hundred ninety thousand, five hundred five".