127983399 has 4 divisors (see below), whose sum is σ = 170644536. Its totient is φ = 85322264.

The previous prime is 127983391. The next prime is 127983403. The reversal of 127983399 is 993389721.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 127983399 - 2³ = 127983391 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (127983391) 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, 21330564 + ... + 21330569.

It is an arithmetic number, because the mean of its divisors is an integer number (42661134).

Almost surely, 2^127983399 is an apocalyptic number.

127983399 is a deficient number, since it is larger than the sum of its proper divisors (42661137).

127983399 is an equidigital number, since it uses as much as digits as its factorization.

127983399 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 42661136.

The product of its digits is 734832, while the sum is 51.

The square root of 127983399 is about 11312.9748077153. The cubic root of 127983399 is about 503.9466315687.

The spelling of 127983399 in words is "one hundred twenty-seven million, nine hundred eighty-three thousand, three hundred ninety-nine".