1609158897 has 12 divisors (see below), whose sum is σ = 2387161140. Its totient is φ = 1043778528.

The previous prime is 1609158883. The next prime is 1609158907. The reversal of 1609158897 is 7988519061.

It can be written as a sum of positive squares in 2 ways, for example, as 701402256 + 907756641 = 26484^2 + 30129^2 .

It is not a de Polignac number, because 1609158897 - 2²² = 1604964593 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1609158877) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 2415822 + ... + 2416487.

It is an arithmetic number, because the mean of its divisors is an integer number (198930095).

Almost surely, 2^1609158897 is an apocalyptic number.

It is an amenable number.

1609158897 is a deficient number, since it is larger than the sum of its proper divisors (778002243).

1609158897 is a wasteful number, since it uses less digits than its factorization.

1609158897 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4832352 (or 4832349 counting only the distinct ones).

The product of its (nonzero) digits is 1088640, while the sum is 54.

The square root of 1609158897 is about 40114.3228411000. The cubic root of 1609158897 is about 1171.8345818423.

The spelling of 1609158897 in words is "one billion, six hundred nine million, one hundred fifty-eight thousand, eight hundred ninety-seven".