132639509 has 4 divisors (see below), whose sum is σ = 133313004. Its totient is φ = 131966016.

The previous prime is 132639497. The next prime is 132639517. The reversal of 132639509 is 905936231.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 105370225 + 27269284 = 10265^2 + 5222^2 .

It is a cyclic number.

It is not a de Polignac number, because 132639509 - 2¹² = 132635413 is a prime.

It is a super-2 number, since 2×132639509² = 35186478695522162, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (132639569) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 336452 + ... + 336845.

It is an arithmetic number, because the mean of its divisors is an integer number (33328251).

Almost surely, 2^132639509 is an apocalyptic number.

It is an amenable number.

132639509 is a deficient number, since it is larger than the sum of its proper divisors (673495).

132639509 is an equidigital number, since it uses as much as digits as its factorization.

132639509 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 673494.

The product of its (nonzero) digits is 43740, while the sum is 38.

The square root of 132639509 is about 11516.9227226721. The cubic root of 132639509 is about 509.9852731875.

The spelling of 132639509 in words is "one hundred thirty-two million, six hundred thirty-nine thousand, five hundred nine".