6904985 has 4 divisors (see below), whose sum is σ = 8285988. Its totient is φ = 5523984.

The previous prime is 6904981. The next prime is 6904993. The reversal of 6904985 is 5894096.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 2968729 + 3936256 = 1723^2 + 1984^2 .

It is a cyclic number.

It is not a de Polignac number, because 6904985 - 2² = 6904981 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (6904981) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 690494 + ... + 690503.

It is an arithmetic number, because the mean of its divisors is an integer number (2071497).

Almost surely, 2^6904985 is an apocalyptic number.

It is an amenable number.

6904985 is a deficient number, since it is larger than the sum of its proper divisors (1381003).

6904985 is a wasteful number, since it uses less digits than its factorization.

6904985 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1381002.

The product of its (nonzero) digits is 77760, while the sum is 41.

The square root of 6904985 is about 2627.7338145254. The cubic root of 6904985 is about 190.4236621870.

The spelling of 6904985 in words is "six million, nine hundred four thousand, nine hundred eighty-five".