127976399 has 4 divisors (see below), whose sum is σ = 128273760. Its totient is φ = 127679040.

The previous prime is 127976383. The next prime is 127976411. The reversal of 127976399 is 993679721.

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 127976399 - 2⁴ = 127976383 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 127976399.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (127976099) 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, 148034 + ... + 148895.

It is an arithmetic number, because the mean of its divisors is an integer number (32068440).

Almost surely, 2^127976399 is an apocalyptic number.

127976399 is a deficient number, since it is larger than the sum of its proper divisors (297361).

127976399 is an equidigital number, since it uses as much as digits as its factorization.

127976399 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 297360.

The product of its digits is 1285956, while the sum is 53.

The square root of 127976399 is about 11312.6654242049. The cubic root of 127976399 is about 503.9374436825.

It can be divided in two parts, 12797 and 6399, that multiplied together give a triangular number (81888003 = T₁₂₇₉₇).

The spelling of 127976399 in words is "one hundred twenty-seven million, nine hundred seventy-six thousand, three hundred ninety-nine".