10138649 has 4 divisors (see below), whose sum is σ = 10147764. Its totient is φ = 10129536.

The previous prime is 10138631. The next prime is 10138651. The reversal of 10138649 is 94683101.

It is a happy number.

10138649 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length, and also an emirpimes, since its reverse is a distinct semiprime: 94683101 = 2269 ⋅41729.

It can be written as a sum of positive squares in 2 ways, for example, as 5031049 + 5107600 = 2243^2 + 2260^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-10138649 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (10135649) 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 in 3 ways as a sum of consecutive naturals, for example, 2612 + ... + 5205.

It is an arithmetic number, because the mean of its divisors is an integer number (2536941).

Almost surely, 2^10138649 is an apocalyptic number.

It is an amenable number.

10138649 is a deficient number, since it is larger than the sum of its proper divisors (9115).

10138649 is an equidigital number, since it uses as much as digits as its factorization.

10138649 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9114.

The product of its (nonzero) digits is 5184, while the sum is 32.

The square root of 10138649 is about 3184.1245264594. The cubic root of 10138649 is about 216.4346030791.

The spelling of 10138649 in words is "ten million, one hundred thirty-eight thousand, six hundred forty-nine".