127398689 has 8 divisors (see below), whose sum is σ = 139371840. Its totient is φ = 115490800.

The previous prime is 127398619. The next prime is 127398701. The reversal of 127398689 is 986893721.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 127398689 - 2⁸ = 127398433 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 127398689.

It is not an unprimeable number, because it can be changed into a prime (127398619) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 12182 + ... + 20079.

It is an arithmetic number, because the mean of its divisors is an integer number (17421480).

Almost surely, 2^127398689 is an apocalyptic number.

It is an amenable number.

127398689 is a deficient number, since it is larger than the sum of its proper divisors (11973151).

127398689 is a wasteful number, since it uses less digits than its factorization.

127398689 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 32631.

The product of its digits is 1306368, while the sum is 53.

The square root of 127398689 is about 11287.1027726339. The cubic root of 127398689 is about 503.1780097124.

The spelling of 127398689 in words is "one hundred twenty-seven million, three hundred ninety-eight thousand, six hundred eighty-nine".