10388381 has 2 divisors, whose sum is σ = 10388382. Its totient is φ = 10388380.

The previous prime is 10388359. The next prime is 10388419. The reversal of 10388381 is 18388301.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 9665881 + 722500 = 3109^2 + 850^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-10388381 is a prime.

It is a super-2 number, since 2×10388381² = 215836919602322, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (10388321) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5194190 + 5194191.

It is an arithmetic number, because the mean of its divisors is an integer number (5194191).

Almost surely, 2^10388381 is an apocalyptic number.

It is an amenable number.

10388381 is a deficient number, since it is larger than the sum of its proper divisors (1).

10388381 is an equidigital number, since it uses as much as digits as its factorization.

10388381 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 4608, while the sum is 32.

The square root of 10388381 is about 3223.1011464116. The cubic root of 10388381 is about 218.1972585401.

The spelling of 10388381 in words is "ten million, three hundred eighty-eight thousand, three hundred eighty-one".