7018681 has 4 divisors (see below), whose sum is σ = 7045632. Its totient is φ = 6991732.

The previous prime is 7018673. The next prime is 7018691. The reversal of 7018681 is 1868107.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 7018681 - 2³ = 7018673 is a prime.

It is a super-2 number, since 2×7018681² = 98523765959522, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (7018691) 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, 13081 + ... + 13606.

It is an arithmetic number, because the mean of its divisors is an integer number (1761408).

Almost surely, 2^7018681 is an apocalyptic number.

It is an amenable number.

7018681 is a deficient number, since it is larger than the sum of its proper divisors (26951).

7018681 is a wasteful number, since it uses less digits than its factorization.

7018681 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26950.

The product of its (nonzero) digits is 2688, while the sum is 31.

The square root of 7018681 is about 2649.2793359704. The cubic root of 7018681 is about 191.4631360164.

The spelling of 7018681 in words is "seven million, eighteen thousand, six hundred eighty-one".