1089679 has 2 divisors, whose sum is σ = 1089680. Its totient is φ = 1089678.

The previous prime is 1089677. The next prime is 1089703. The reversal of 1089679 is 9769801.

It is a weak prime.

It is an emirp because it is prime and its reverse (9769801) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1089679 - 2¹ = 1089677 is a prime.

Together with 1089677, 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 (1089677) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 544839 + 544840.

It is an arithmetic number, because the mean of its divisors is an integer number (544840).

2^1089679 is an apocalyptic number.

1089679 is a deficient number, since it is larger than the sum of its proper divisors (1).

1089679 is an equidigital number, since it uses as much as digits as its factorization.

1089679 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 27216, while the sum is 40.

The square root of 1089679 is about 1043.8769084523. The cubic root of 1089679 is about 102.9041430741.

The spelling of 1089679 in words is "one million, eighty-nine thousand, six hundred seventy-nine".