7438381 has 2 divisors, whose sum is σ = 7438382. Its totient is φ = 7438380.

The previous prime is 7438373. The next prime is 7438399. The reversal of 7438381 is 1838347.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 6081156 + 1357225 = 2466^2 + 1165^2 .

It is a cyclic number.

It is not a de Polignac number, because 7438381 - 2³ = 7438373 is a prime.

It is a super-2 number, since 2×7438381² = 110659023802322, which contains 22 as substring.

It is an alternating number because its digits alternate between odd and even.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (7438331) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3719190 + 3719191.

It is an arithmetic number, because the mean of its divisors is an integer number (3719191).

Almost surely, 2^7438381 is an apocalyptic number.

It is an amenable number.

7438381 is a deficient number, since it is larger than the sum of its proper divisors (1).

7438381 is an equidigital number, since it uses as much as digits as its factorization.

7438381 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 16128, while the sum is 34.

The square root of 7438381 is about 2727.3395461512. The cubic root of 7438381 is about 195.2058400592.

Subtracting from 7438381 its sum of digits (34), we obtain a palindrome (7438347).

The spelling of 7438381 in words is "seven million, four hundred thirty-eight thousand, three hundred eighty-one".