1689227361 has 12 divisors (see below), whose sum is σ = 2440639188. Its totient is φ = 1125854304.

The previous prime is 1689227327. The next prime is 1689227377. The reversal of 1689227361 is 1637229861.

1689227361 is a `hidden beast` number, since 1 + 68 + 9 + 227 + 361 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 488189025 + 1201038336 = 22095^2 + 34656^2 .

It is not a de Polignac number, because 1689227361 - 2⁹ = 1689226849 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1689227261) 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, 14491 + ... + 59903.

It is an arithmetic number, because the mean of its divisors is an integer number (203386599).

Almost surely, 2^1689227361 is an apocalyptic number.

It is an amenable number.

1689227361 is a deficient number, since it is larger than the sum of its proper divisors (751411827).

1689227361 is a wasteful number, since it uses less digits than its factorization.

1689227361 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 49552 (or 49549 counting only the distinct ones).

The product of its digits is 217728, while the sum is 45.

The square root of 1689227361 is about 41100.2112038369. The cubic root of 1689227361 is about 1190.9568748436.

It can be divided in two parts, 16892 and 27361, that added together give a triangular number (44253 = T₂₉₇).

The spelling of 1689227361 in words is "one billion, six hundred eighty-nine million, two hundred twenty-seven thousand, three hundred sixty-one".