1078789 has 2 divisors, whose sum is σ = 1078790. Its totient is φ = 1078788.

The previous prime is 1078787. The next prime is 1078807. The reversal of 1078789 is 9878701.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 950625 + 128164 = 975^2 + 358^2 .

It is a cyclic number.

It is not a de Polignac number, because 1078789 - 2¹ = 1078787 is a prime.

Together with 1078787, it forms a pair of twin primes.

It is an alternating number because its digits alternate between odd and even.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1078787) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 539394 + 539395.

It is an arithmetic number, because the mean of its divisors is an integer number (539395).

2^1078789 is an apocalyptic number.

It is an amenable number.

1078789 is a deficient number, since it is larger than the sum of its proper divisors (1).

1078789 is an equidigital number, since it uses as much as digits as its factorization.

1078789 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 28224, while the sum is 40.

The square root of 1078789 is about 1038.6476784743. The cubic root of 1078789 is about 102.5601946647.

The spelling of 1078789 in words is "one million, seventy-eight thousand, seven hundred eighty-nine".