10499981 has 2 divisors, whose sum is σ = 10499982. Its totient is φ = 10499980.

The previous prime is 10499963. The next prime is 10500013. The reversal of 10499981 is 18999401.

10499981 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., 10432900 + 67081 = 3230^2 + 259^2 .

It is a cyclic number.

It is not a de Polignac number, because 10499981 - 2¹⁴ = 10483597 is a prime.

It is a super-2 number, since 2×10499981² = 220499202000722, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (10499911) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5249990 + 5249991.

It is an arithmetic number, because the mean of its divisors is an integer number (5249991).

Almost surely, 2^10499981 is an apocalyptic number.

It is an amenable number.

10499981 is a deficient number, since it is larger than the sum of its proper divisors (1).

10499981 is an equidigital number, since it uses as much as digits as its factorization.

10499981 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 23328, while the sum is 41.

The square root of 10499981 is about 3240.3674174390. The cubic root of 10499981 is about 218.9758249136.

The spelling of 10499981 in words is "ten million, four hundred ninety-nine thousand, nine hundred eighty-one".