1078906189 has 2 divisors, whose sum is σ = 1078906190. Its totient is φ = 1078906188.

The previous prime is 1078906187. The next prime is 1078906217. The reversal of 1078906189 is 9816098701.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1047040164 + 31866025 = 32358^2 + 5645^2 .

It is a cyclic number.

It is not a de Polignac number, because 1078906189 - 2¹ = 1078906187 is a prime.

Together with 1078906187, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1078906187) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 539453094 + 539453095.

It is an arithmetic number, because the mean of its divisors is an integer number (539453095).

Almost surely, 2^1078906189 is an apocalyptic number.

It is an amenable number.

1078906189 is a deficient number, since it is larger than the sum of its proper divisors (1).

1078906189 is an equidigital number, since it uses as much as digits as its factorization.

1078906189 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 217728, while the sum is 49.

The square root of 1078906189 is about 32846.7074301215. The cubic root of 1078906189 is about 1025.6390823964.

The spelling of 1078906189 in words is "one billion, seventy-eight million, nine hundred six thousand, one hundred eighty-nine".