10509387 has 16 divisors (see below), whose sum is σ = 16197120. Its totient is φ = 5936832.

The previous prime is 10509371. The next prime is 10509461. The reversal of 10509387 is 78390501.

It is not a de Polignac number, because 10509387 - 2⁴ = 10509371 is a prime.

It is a super-2 number, since 2×10509387² = 220894430231538, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (10509487) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 943 + ... + 4680.

It is an arithmetic number, because the mean of its divisors is an integer number (1012320).

Almost surely, 2^10509387 is an apocalyptic number.

10509387 is a deficient number, since it is larger than the sum of its proper divisors (5687733).

10509387 is an equidigital number, since it uses as much as digits as its factorization.

10509387 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5722.

The product of its (nonzero) digits is 7560, while the sum is 33.

The square root of 10509387 is about 3241.8184711671. The cubic root of 10509387 is about 219.0411923933.

Adding to 10509387 its reverse (78390501), we get a palindrome (88899888).

The spelling of 10509387 in words is "ten million, five hundred nine thousand, three hundred eighty-seven".