1061591289 has 32 divisors (see below), whose sum is σ = 1619841024. Its totient is φ = 612142080.

The previous prime is 1061591287. The next prime is 1061591317. The reversal of 1061591289 is 9821951601.

It is not a de Polignac number, because 1061591289 - 2¹ = 1061591287 is a prime.

It is a super-2 number, since 2×1061591289² = 2253952129761363042, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 1061591289.

It is not an unprimeable number, because it can be changed into a prime (1061591287) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 142864 + ... + 150110.

It is an arithmetic number, because the mean of its divisors is an integer number (50620032).

Almost surely, 2^1061591289 is an apocalyptic number.

It is an amenable number.

1061591289 is a deficient number, since it is larger than the sum of its proper divisors (558249735).

1061591289 is a wasteful number, since it uses less digits than its factorization.

1061591289 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7477.

The product of its (nonzero) digits is 38880, while the sum is 42.

The square root of 1061591289 is about 32582.0700539422. The cubic root of 1061591289 is about 1020.1227870254.

The spelling of 1061591289 in words is "one billion, sixty-one million, five hundred ninety-one thousand, two hundred eighty-nine".