1170485209 has 4 divisors (see below), whose sum is σ = 1170558004. Its totient is φ = 1170412416.

The previous prime is 1170485201. The next prime is 1170485237. The reversal of 1170485209 is 9025840711.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length, and also an emirpimes, since its reverse is a distinct semiprime: 9025840711 = 23 ⋅392427857.

It can be written as a sum of positive squares in 2 ways, for example, as 480267225 + 690217984 = 21915^2 + 26272^2 .

It is a cyclic number.

It is not a de Polignac number, because 1170485209 - 2³ = 1170485201 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1170485201) 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, 432 + ... + 48385.

It is an arithmetic number, because the mean of its divisors is an integer number (292639501).

Almost surely, 2^1170485209 is an apocalyptic number.

It is an amenable number.

1170485209 is a deficient number, since it is larger than the sum of its proper divisors (72795).

1170485209 is an equidigital number, since it uses as much as digits as its factorization.

1170485209 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 72794.

The product of its (nonzero) digits is 20160, while the sum is 37.

The square root of 1170485209 is about 34212.3546251935. The cubic root of 1170485209 is about 1053.8738862679.

The spelling of 1170485209 in words is "one billion, one hundred seventy million, four hundred eighty-five thousand, two hundred nine".