127109321 has 4 divisors (see below), whose sum is σ = 127132944. Its totient is φ = 127085700.

The previous prime is 127109303. The next prime is 127109329. The reversal of 127109321 is 123901721.

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 a de Polignac number, because none of the positive numbers 2^k-127109321 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (127109329) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 626 + ... + 15956.

It is an arithmetic number, because the mean of its divisors is an integer number (31783236).

Almost surely, 2^127109321 is an apocalyptic number.

It is an amenable number.

127109321 is a deficient number, since it is larger than the sum of its proper divisors (23623).

127109321 is an equidigital number, since it uses as much as digits as its factorization.

127109321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23622.

The product of its (nonzero) digits is 756, while the sum is 26.

The square root of 127109321 is about 11274.2769612956. The cubic root of 127109321 is about 502.7967551535.

The spelling of 127109321 in words is "one hundred twenty-seven million, one hundred nine thousand, three hundred twenty-one".