127913789 has 4 divisors (see below), whose sum is σ = 129087420. Its totient is φ = 126740160.

The previous prime is 127913759. The next prime is 127913801. The reversal of 127913789 is 987319721.

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 65772100 + 62141689 = 8110^2 + 7883^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-127913789 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 (127913759) 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, 586652 + ... + 586869.

It is an arithmetic number, because the mean of its divisors is an integer number (32271855).

Almost surely, 2^127913789 is an apocalyptic number.

It is an amenable number.

127913789 is a deficient number, since it is larger than the sum of its proper divisors (1173631).

127913789 is a wasteful number, since it uses less digits than its factorization.

127913789 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1173630.

The product of its digits is 190512, while the sum is 47.

The square root of 127913789 is about 11309.8978333140. The cubic root of 127913789 is about 503.8552496990.

The spelling of 127913789 in words is "one hundred twenty-seven million, nine hundred thirteen thousand, seven hundred eighty-nine".