7218698 has 4 divisors (see below), whose sum is σ = 10828050. Its totient is φ = 3609348.

The previous prime is 7218697. The next prime is 7218713. The reversal of 7218698 is 8968127.

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

It can be written as a sum of positive squares in only one way, i.e., 4338889 + 2879809 = 2083^2 + 1697^2 .

It is not an unprimeable number, because it can be changed into a prime (7218697) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1804673 + ... + 1804676.

Almost surely, 2^7218698 is an apocalyptic number.

7218698 is a deficient number, since it is larger than the sum of its proper divisors (3609352).

7218698 is a wasteful number, since it uses less digits than its factorization.

7218698 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3609351.

The product of its digits is 48384, while the sum is 41.

The square root of 7218698 is about 2686.7634804724. The cubic root of 7218698 is about 193.2648872518.

The spelling of 7218698 in words is "seven million, two hundred eighteen thousand, six hundred ninety-eight".