7213898 has 4 divisors (see below), whose sum is σ = 10820850. Its totient is φ = 3606948.

The previous prime is 7213897. The next prime is 7213903. The reversal of 7213898 is 8983127.

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., 4566769 + 2647129 = 2137^2 + 1627^2 .

It is an Ulam number.

It is not an unprimeable number, because it can be changed into a prime (7213897) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1803473 + ... + 1803476.

Almost surely, 2^7213898 is an apocalyptic number.

7213898 is a deficient number, since it is larger than the sum of its proper divisors (3606952).

7213898 is a wasteful number, since it uses less digits than its factorization.

7213898 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3606951.

The product of its digits is 24192, while the sum is 38.

The square root of 7213898 is about 2685.8700638713. The cubic root of 7213898 is about 193.2220412451. Note that the first 3 decimals are identical.

The spelling of 7213898 in words is "seven million, two hundred thirteen thousand, eight hundred ninety-eight".