1166609297 has 12 divisors (see below), whose sum is σ = 1393756020. Its totient is φ = 972923616.

The previous prime is 1166609273. The next prime is 1166609317. The reversal of 1166609297 is 7929066611.

It can be written as a sum of positive squares in 2 ways, for example, as 450458176 + 716151121 = 21224^2 + 26761^2 .

It is not a de Polignac number, because 1166609297 - 2¹² = 1166605201 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1166609497) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 319922 + ... + 323547.

It is an arithmetic number, because the mean of its divisors is an integer number (116146335).

Almost surely, 2^1166609297 is an apocalyptic number.

It is an amenable number.

1166609297 is a deficient number, since it is larger than the sum of its proper divisors (227146723).

1166609297 is an equidigital number, since it uses as much as digits as its factorization.

1166609297 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 643520 (or 643513 counting only the distinct ones).

The product of its (nonzero) digits is 244944, while the sum is 47.

The square root of 1166609297 is about 34155.6627369460. The cubic root of 1166609297 is about 1052.7093437339.

The spelling of 1166609297 in words is "one billion, one hundred sixty-six million, six hundred nine thousand, two hundred ninety-seven".