7303981 has 8 divisors (see below), whose sum is σ = 7448760. Its totient is φ = 7160832.

The previous prime is 7303979. The next prime is 7303991. The reversal of 7303981 is 1893037.

It can be written as a sum of positive squares in 4 ways, for example, as 366025 + 6937956 = 605^2 + 2634^2 .

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 7303981 - 2¹ = 7303979 is a prime.

It is a super-2 number, since 2×7303981² = 106696276896722, which contains 22 as substring.

It is a Duffinian number.

It is a nialpdrome in base 15.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (7303921) 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, 12021 + ... + 12613.

It is an arithmetic number, because the mean of its divisors is an integer number (931095).

Almost surely, 2^7303981 is an apocalyptic number.

It is an amenable number.

7303981 is a deficient number, since it is larger than the sum of its proper divisors (144779).

7303981 is a wasteful number, since it uses less digits than its factorization.

7303981 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 815.

The product of its (nonzero) digits is 4536, while the sum is 31.

The square root of 7303981 is about 2702.5878339103. The cubic root of 7303981 is about 194.0229983009.

The spelling of 7303981 in words is "seven million, three hundred three thousand, nine hundred eighty-one".