10389881 has 2 divisors, whose sum is σ = 10389882. Its totient is φ = 10389880.

The previous prime is 10389877. The next prime is 10389889. The reversal of 10389881 is 18898301.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 6150400 + 4239481 = 2480^2 + 2059^2 .

It is a cyclic number.

It is not a de Polignac number, because 10389881 - 2² = 10389877 is a prime.

It is a super-2 number, since 2×10389881² = 215899254388322, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (10389889) 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, 5194940 + 5194941.

It is an arithmetic number, because the mean of its divisors is an integer number (5194941).

Almost surely, 2^10389881 is an apocalyptic number.

It is an amenable number.

10389881 is a deficient number, since it is larger than the sum of its proper divisors (1).

10389881 is an equidigital number, since it uses as much as digits as its factorization.

10389881 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 13824, while the sum is 38.

The square root of 10389881 is about 3223.3338331609. Note that the first 3 decimals coincide. The cubic root of 10389881 is about 218.2077600204.

The spelling of 10389881 in words is "ten million, three hundred eighty-nine thousand, eight hundred eighty-one".