1078123199 has 2 divisors, whose sum is σ = 1078123200. Its totient is φ = 1078123198.

The previous prime is 1078123171. The next prime is 1078123237. The reversal of 1078123199 is 9913218701.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1078123199 - 2²⁰ = 1077074623 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1078123129) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 539061599 + 539061600.

It is an arithmetic number, because the mean of its divisors is an integer number (539061600).

Almost surely, 2^1078123199 is an apocalyptic number.

1078123199 is a deficient number, since it is larger than the sum of its proper divisors (1).

1078123199 is an equidigital number, since it uses as much as digits as its factorization.

1078123199 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 27216, while the sum is 41.

The square root of 1078123199 is about 32834.7864162385. The cubic root of 1078123199 is about 1025.3909114556.

The spelling of 1078123199 in words is "one billion, seventy-eight million, one hundred twenty-three thousand, one hundred ninety-nine".