1170899889 has 4 divisors (see below), whose sum is σ = 1561199856. Its totient is φ = 780599924.

The previous prime is 1170899887. The next prime is 1170899929. The reversal of 1170899889 is 9889980711.

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 1170899889 - 2¹ = 1170899887 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1170899887) 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, 195149979 + ... + 195149984.

It is an arithmetic number, because the mean of its divisors is an integer number (390299964).

Almost surely, 2^1170899889 is an apocalyptic number.

It is an amenable number.

1170899889 is a deficient number, since it is larger than the sum of its proper divisors (390299967).

1170899889 is an equidigital number, since it uses as much as digits as its factorization.

1170899889 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 390299966.

The product of its (nonzero) digits is 2612736, while the sum is 60.

The square root of 1170899889 is about 34218.4144723276. The cubic root of 1170899889 is about 1053.9983272036.

The spelling of 1170899889 in words is "one billion, one hundred seventy million, eight hundred ninety-nine thousand, eight hundred eighty-nine".