10139509 has 2 divisors, whose sum is σ = 10139510. Its totient is φ = 10139508.

The previous prime is 10139501. The next prime is 10139513. The reversal of 10139509 is 90593101.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 7006609 + 3132900 = 2647^2 + 1770^2 .

It is a cyclic number.

It is not a de Polignac number, because 10139509 - 2³ = 10139501 is a prime.

It is a super-2 number, since 2×10139509² = 205619285522162, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (10139501) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5069754 + 5069755.

It is an arithmetic number, because the mean of its divisors is an integer number (5069755).

Almost surely, 2^10139509 is an apocalyptic number.

It is an amenable number.

10139509 is a deficient number, since it is larger than the sum of its proper divisors (1).

10139509 is an equidigital number, since it uses as much as digits as its factorization.

10139509 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1215, while the sum is 28.

The square root of 10139509 is about 3184.2595685654. The cubic root of 10139509 is about 216.4407225169.

It can be divided in two parts, 10139 and 509, that added together give a cube (10648 = 22³).

The spelling of 10139509 in words is "ten million, one hundred thirty-nine thousand, five hundred nine".