7320391 has 8 divisors (see below), whose sum is σ = 8051904. Its totient is φ = 6612960.

The previous prime is 7320359. The next prime is 7320403. The reversal of 7320391 is 1930237.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 7320391 - 2⁵ = 7320359 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 (7320311) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5380 + ... + 6601.

It is an arithmetic number, because the mean of its divisors is an integer number (1006488).

Almost surely, 2^7320391 is an apocalyptic number.

7320391 is a deficient number, since it is larger than the sum of its proper divisors (731513).

7320391 is a wasteful number, since it uses less digits than its factorization.

7320391 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12041.

The product of its (nonzero) digits is 1134, while the sum is 25.

The square root of 7320391 is about 2705.6221096081. The cubic root of 7320391 is about 194.1681947317.

The spelling of 7320391 in words is "seven million, three hundred twenty thousand, three hundred ninety-one".