1078691 has 2 divisors, whose sum is σ = 1078692. Its totient is φ = 1078690.

The previous prime is 1078681. The next prime is 1078699. The reversal of 1078691 is 1968701.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1078691 - 2¹⁸ = 816547 is a prime.

It is not a weakly prime, because it can be changed into another prime (1078699) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 539345 + 539346.

It is an arithmetic number, because the mean of its divisors is an integer number (539346).

2^1078691 is an apocalyptic number.

1078691 is a deficient number, since it is larger than the sum of its proper divisors (1).

1078691 is an equidigital number, since it uses as much as digits as its factorization.

1078691 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3024, while the sum is 32.

The square root of 1078691 is about 1038.6005006739. The cubic root of 1078691 is about 102.5570889590.

The spelling of 1078691 in words is "one million, seventy-eight thousand, six hundred ninety-one".