1128919679 has 2 divisors, whose sum is σ = 1128919680. Its totient is φ = 1128919678.

The previous prime is 1128919643. The next prime is 1128919681. The reversal of 1128919679 is 9769198211.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1128919679 is a prime.

It is a Sophie Germain prime.

Together with 1128919681, it forms a pair of twin primes.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1128919679.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1128919079) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 564459839 + 564459840.

It is an arithmetic number, because the mean of its divisors is an integer number (564459840).

Almost surely, 2^1128919679 is an apocalyptic number.

1128919679 is a deficient number, since it is larger than the sum of its proper divisors (1).

1128919679 is an equidigital number, since it uses as much as digits as its factorization.

1128919679 is an evil number, because the sum of its binary digits is even.

The product of its digits is 489888, while the sum is 53.

The square root of 1128919679 is about 33599.3999797615. The cubic root of 1128919679 is about 1041.2484019081.

The spelling of 1128919679 in words is "one billion, one hundred twenty-eight million, nine hundred nineteen thousand, six hundred seventy-nine".