1090678857 has 4 divisors (see below), whose sum is σ = 1454238480. Its totient is φ = 727119236.

The previous prime is 1090678829. The next prime is 1090678867. The reversal of 1090678857 is 7588760901.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 1090678857 - 2¹¹ = 1090676809 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1090678817) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 181779807 + ... + 181779812.

It is an arithmetic number, because the mean of its divisors is an integer number (363559620).

Almost surely, 2^1090678857 is an apocalyptic number.

It is an amenable number.

1090678857 is a deficient number, since it is larger than the sum of its proper divisors (363559623).

1090678857 is an equidigital number, since it uses as much as digits as its factorization.

1090678857 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 363559622.

The product of its (nonzero) digits is 846720, while the sum is 51.

The square root of 1090678857 is about 33025.4274309963. The cubic root of 1090678857 is about 1029.3560737821.

The spelling of 1090678857 in words is "one billion, ninety million, six hundred seventy-eight thousand, eight hundred fifty-seven".