10387309 has 4 divisors (see below), whose sum is σ = 10640700. Its totient is φ = 10133920.

The previous prime is 10387297. The next prime is 10387313. The reversal of 10387309 is 90378301.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 90378301 = 13 ⋅6952177.

It can be written as a sum of positive squares in 2 ways, for example, as 3348900 + 7038409 = 1830^2 + 2653^2 .

It is a cyclic number.

It is not a de Polignac number, because 10387309 - 2¹⁵ = 10354541 is a prime.

It is a super-2 number, since 2×10387309² = 215792376522962, which contains 22 as substring.

It is a Smith number, since the sum of its digits (31) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (10387339) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 126634 + ... + 126715.

It is an arithmetic number, because the mean of its divisors is an integer number (2660175).

Almost surely, 2^10387309 is an apocalyptic number.

It is an amenable number.

10387309 is a deficient number, since it is larger than the sum of its proper divisors (253391).

10387309 is an equidigital number, since it uses as much as digits as its factorization.

10387309 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 253390.

The product of its (nonzero) digits is 4536, while the sum is 31.

The square root of 10387309 is about 3222.9348426551. The cubic root of 10387309 is about 218.1897528627.

The spelling of 10387309 in words is "ten million, three hundred eighty-seven thousand, three hundred nine".