7813198 has 4 divisors (see below), whose sum is σ = 11719800. Its totient is φ = 3906598.

The previous prime is 7813181. The next prime is 7813213. The reversal of 7813198 is 8913187.

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

It is a super-2 number, since 2×7813198² = 122092125974408, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1953298 + ... + 1953301.

It is an arithmetic number, because the mean of its divisors is an integer number (2929950).

Almost surely, 2^7813198 is an apocalyptic number.

7813198 is a deficient number, since it is larger than the sum of its proper divisors (3906602).

7813198 is a wasteful number, since it uses less digits than its factorization.

7813198 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3906601.

The product of its digits is 12096, while the sum is 37.

The square root of 7813198 is about 2795.2098311218. The cubic root of 7813198 is about 198.4310406850.

The spelling of 7813198 in words is "seven million, eight hundred thirteen thousand, one hundred ninety-eight".