6999013 has 6 divisors (see below), whose sum is σ = 8141766. Its totient is φ = 5999112.

The previous prime is 6999007. The next prime is 6999017. The reversal of 6999013 is 3109996.

It can be written as a sum of positive squares in only one way, i.e., 5303809 + 1695204 = 2303^2 + 1302^2 .

It is not a de Polignac number, because 6999013 - 2⁹ = 6998501 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 (6999017) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 71370 + ... + 71467.

It is an arithmetic number, because the mean of its divisors is an integer number (1356961).

Almost surely, 2^6999013 is an apocalyptic number.

It is an amenable number.

6999013 is a deficient number, since it is larger than the sum of its proper divisors (1142753).

6999013 is a wasteful number, since it uses less digits than its factorization.

6999013 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 142851 (or 142844 counting only the distinct ones).

The product of its (nonzero) digits is 13122, while the sum is 37.

The square root of 6999013 is about 2645.5647790217. The cubic root of 6999013 is about 191.2841270781.

The spelling of 6999013 in words is "six million, nine hundred ninety-nine thousand, thirteen".