7198391 has 4 divisors (see below), whose sum is σ = 7251072. Its totient is φ = 7145712.

The previous prime is 7198369. The next prime is 7198403. The reversal of 7198391 is 1938917.

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

It is a cyclic number.

It is not a de Polignac number, because 7198391 - 2¹⁸ = 6936247 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 (7198691) 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, 26135 + ... + 26408.

It is an arithmetic number, because the mean of its divisors is an integer number (1812768).

Almost surely, 2^7198391 is an apocalyptic number.

7198391 is a deficient number, since it is larger than the sum of its proper divisors (52681).

7198391 is a wasteful number, since it uses less digits than its factorization.

7198391 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 52680.

The product of its digits is 13608, while the sum is 38.

The square root of 7198391 is about 2682.9817367996. The cubic root of 7198391 is about 193.0834918456.

The spelling of 7198391 in words is "seven million, one hundred ninety-eight thousand, three hundred ninety-one".