7320981 has 4 divisors (see below), whose sum is σ = 9761312. Its totient is φ = 4880652.

The previous prime is 7320979. The next prime is 7320983. The reversal of 7320981 is 1890237.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is an interprime number because it is at equal distance from previous prime (7320979) and next prime (7320983).

It is not a de Polignac number, because 7320981 - 2¹ = 7320979 is a prime.

It is a super-2 number, since 2×7320981² = 107193525604722, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (7320983) 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, 1220161 + ... + 1220166.

It is an arithmetic number, because the mean of its divisors is an integer number (2440328).

Almost surely, 2^7320981 is an apocalyptic number.

It is an amenable number.

7320981 is a deficient number, since it is larger than the sum of its proper divisors (2440331).

7320981 is a wasteful number, since it uses less digits than its factorization.

7320981 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2440330.

The product of its (nonzero) digits is 3024, while the sum is 30.

The square root of 7320981 is about 2705.7311396368. The cubic root of 7320981 is about 194.1734110359.

The spelling of 7320981 in words is "seven million, three hundred twenty thousand, nine hundred eighty-one".