128976919 has 2 divisors, whose sum is σ = 128976920. Its totient is φ = 128976918.

The previous prime is 128976889. The next prime is 128976941. The reversal of 128976919 is 919679821.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 128976919 - 2¹³ = 128968727 is a prime.

It is a super-2 number, since 2×128976919² = 33270091269465122, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (128976989) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 64488459 + 64488460.

It is an arithmetic number, because the mean of its divisors is an integer number (64488460).

Almost surely, 2^128976919 is an apocalyptic number.

128976919 is a deficient number, since it is larger than the sum of its proper divisors (1).

128976919 is an equidigital number, since it uses as much as digits as its factorization.

128976919 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 489888, while the sum is 52.

The square root of 128976919 is about 11356.8005617780. The cubic root of 128976919 is about 505.2472977594.

The spelling of 128976919 in words is "one hundred twenty-eight million, nine hundred seventy-six thousand, nine hundred nineteen".