1061651889 has 9 divisors (see below), whose sum is σ = 1533638379. Its totient is φ = 707702760.

The previous prime is 1061651879. The next prime is 1061652013. The reversal of 1061651889 is 9881561601.

The square root of 1061651889 is 32583.

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

1061651889 is a `hidden beast` number, since 10 + 616 + 5 + 18 + 8 + 9 = 666.

It can be written as a sum of positive squares in only one way, i.e., 417507489 + 644144400 = 20433^2 + 25380^2 .

It is a tau number, because it is divible by the number of its divisors (9).

It is not a de Polignac number, because 1061651889 - 2¹³ = 1061643697 is a prime.

It is a super-2 number, since 2×1061651889² = 2254209466834536642, which contains 22 as substring.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (1061651879) 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, 92319 + ... + 103179.

Almost surely, 2^1061651889 is an apocalyptic number.

1061651889 is the 32583-rd square number.

1061651889 is the 16292-nd centered octagonal number.

It is an amenable number.

1061651889 is a deficient number, since it is larger than the sum of its proper divisors (471986490).

1061651889 is an frugal number, since it uses more digits than its factorization.

1061651889 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21728 (or 10864 counting only the distinct ones).

The product of its (nonzero) digits is 103680, while the sum is 45.

The cubic root of 1061651889 is about 1020.1421975918.

The spelling of 1061651889 in words is "one billion, sixty-one million, six hundred fifty-one thousand, eight hundred eighty-nine".