7393681 has 2 divisors, whose sum is σ = 7393682. Its totient is φ = 7393680.

The previous prime is 7393667. The next prime is 7393697. The reversal of 7393681 is 1863937.

7393681 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 5022081 + 2371600 = 2241^2 + 1540^2 .

It is a cyclic number.

It is not a de Polignac number, because 7393681 - 2¹³ = 7385489 is a prime.

It is a super-2 number, since 2×7393681² = 109333037459522, which contains 22 as substring.

7393681 is a lucky number.

It is a self number, because there is not a number n which added to its sum of digits gives 7393681.

It is not a weakly prime, because it can be changed into another prime (7393621) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3696840 + 3696841.

It is an arithmetic number, because the mean of its divisors is an integer number (3696841).

Almost surely, 2^7393681 is an apocalyptic number.

It is an amenable number.

7393681 is a deficient number, since it is larger than the sum of its proper divisors (1).

7393681 is an equidigital number, since it uses as much as digits as its factorization.

7393681 is an evil number, because the sum of its binary digits is even.

The product of its digits is 27216, while the sum is 37.

The square root of 7393681 is about 2719.1323983948. The cubic root of 7393681 is about 194.8140326529.

The spelling of 7393681 in words is "seven million, three hundred ninety-three thousand, six hundred eighty-one".