127900609 has 4 divisors (see below), whose sum is σ = 134632240. Its totient is φ = 121168980.

The previous prime is 127900589. The next prime is 127900679. The reversal of 127900609 is 906009721.

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, and also an emirpimes, since its reverse is a distinct semiprime: 906009721 = 23 ⋅39391727.

It is a cyclic number.

It is not a de Polignac number, because 127900609 - 2⁷ = 127900481 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (127900679) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3365787 + ... + 3365824.

It is an arithmetic number, because the mean of its divisors is an integer number (33658060).

Almost surely, 2^127900609 is an apocalyptic number.

127900609 is a gapful number since it is divisible by the number (19) formed by its first and last digit.

It is an amenable number.

127900609 is a deficient number, since it is larger than the sum of its proper divisors (6731631).

127900609 is an equidigital number, since it uses as much as digits as its factorization.

127900609 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6731630.

The product of its (nonzero) digits is 6804, while the sum is 34.

The square root of 127900609 is about 11309.3151428369. The cubic root of 127900609 is about 503.8379436672.

The spelling of 127900609 in words is "one hundred twenty-seven million, nine hundred thousand, six hundred nine".