1641627289 has 9 divisors (see below), whose sum is σ = 1697590101. Its totient is φ = 1587456060.

The previous prime is 1641627263. The next prime is 1641627307. The reversal of 1641627289 is 9827261461.

The square root of 1641627289 is 40517.

It is a perfect power (a square), and thus also a powerful number.

It is not a de Polignac number, because 1641627289 - 2⁵ = 1641627257 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1641627209) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 1255374 + ... + 1256680.

Almost surely, 2^1641627289 is an apocalyptic number.

1641627289 is the 40517-th square number.

1641627289 is the 20259-th centered octagonal number.

It is an amenable number.

1641627289 is a deficient number, since it is larger than the sum of its proper divisors (55962812).

1641627289 is an frugal number, since it uses more digits than its factorization.

1641627289 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2676 (or 1338 counting only the distinct ones).

The product of its digits is 290304, while the sum is 46.

The cubic root of 1641627289 is about 1179.6636235972.

The spelling of 1641627289 in words is "one billion, six hundred forty-one million, six hundred twenty-seven thousand, two hundred eighty-nine".