7443681 has 8 divisors (see below), whose sum is σ = 11342784. Its totient is φ = 4253520.

The previous prime is 7443679. The next prime is 7443727. The reversal of 7443681 is 1863447.

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

It is not a de Polignac number, because 7443681 - 2¹ = 7443679 is a prime.

It is a super-2 number, since 2×7443681² = 110816773659522, which contains 22 as substring.

It is a Smith number, since the sum of its digits (33) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is not an unprimeable number, because it can be changed into a prime (7443481) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 177210 + ... + 177251.

It is an arithmetic number, because the mean of its divisors is an integer number (1417848).

Almost surely, 2^7443681 is an apocalyptic number.

It is an amenable number.

7443681 is a deficient number, since it is larger than the sum of its proper divisors (3899103).

7443681 is a wasteful number, since it uses less digits than its factorization.

7443681 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 354471.

The product of its digits is 16128, while the sum is 33.

The square root of 7443681 is about 2728.3110159951. The cubic root of 7443681 is about 195.2521917822.

The spelling of 7443681 in words is "seven million, four hundred forty-three thousand, six hundred eighty-one".