127680979 has 2 divisors, whose sum is σ = 127680980. Its totient is φ = 127680978.

The previous prime is 127680961. The next prime is 127680983. The reversal of 127680979 is 979086721.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 127680979 - 2⁵ = 127680947 is a prime.

It is not a weakly prime, because it can be changed into another prime (127680479) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 63840489 + 63840490.

It is an arithmetic number, because the mean of its divisors is an integer number (63840490).

Almost surely, 2^127680979 is an apocalyptic number.

127680979 is a deficient number, since it is larger than the sum of its proper divisors (1).

127680979 is an equidigital number, since it uses as much as digits as its factorization.

127680979 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 381024, while the sum is 49.

The square root of 127680979 is about 11299.6008336578. The cubic root of 127680979 is about 503.5493828093.

The spelling of 127680979 in words is "one hundred twenty-seven million, six hundred eighty thousand, nine hundred seventy-nine".