7400381 has 2 divisors, whose sum is σ = 7400382. Its totient is φ = 7400380.

The previous prime is 7400369. The next prime is 7400399. The reversal of 7400381 is 1830047.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 6528025 + 872356 = 2555^2 + 934^2 .

It is an emirp because it is prime and its reverse (1830047) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 7400381 - 2⁶ = 7400317 is a prime.

It is a super-2 number, since 2×7400381² = 109531277890322, which contains 22 as substring.

It is a Sophie Germain prime.

It is a Chen prime.

It is an Ulam number.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (7100381) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3700190 + 3700191.

It is an arithmetic number, because the mean of its divisors is an integer number (3700191).

Almost surely, 2^7400381 is an apocalyptic number.

It is an amenable number.

7400381 is a deficient number, since it is larger than the sum of its proper divisors (1).

7400381 is an equidigital number, since it uses as much as digits as its factorization.

7400381 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 672, while the sum is 23.

The square root of 7400381 is about 2720.3641300385. The cubic root of 7400381 is about 194.8728603623.

The spelling of 7400381 in words is "seven million, four hundred thousand, three hundred eighty-one".