127113509 has 4 divisors (see below), whose sum is σ = 127283520. Its totient is φ = 126943500.

The previous prime is 127113499. The next prime is 127113533. The reversal of 127113509 is 905311721.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 127113509 - 2²⁴ = 110336293 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (127113559) 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, 83879 + ... + 85380.

It is an arithmetic number, because the mean of its divisors is an integer number (31820880).

Almost surely, 2^127113509 is an apocalyptic number.

It is an amenable number.

127113509 is a deficient number, since it is larger than the sum of its proper divisors (170011).

127113509 is an equidigital number, since it uses as much as digits as its factorization.

127113509 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 170010.

The product of its (nonzero) digits is 1890, while the sum is 29.

The square root of 127113509 is about 11274.4626922971. The cubic root of 127113509 is about 502.8022771448.

The spelling of 127113509 in words is "one hundred twenty-seven million, one hundred thirteen thousand, five hundred nine".