1061930591 has 4 divisors (see below), whose sum is σ = 1066337184. Its totient is φ = 1057524000.

The previous prime is 1061930581. The next prime is 1061930609. The reversal of 1061930591 is 1950391601.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 1061930591 - 2¹⁰ = 1061929567 is a prime.

It is a super-2 number, since 2×1061930591² = 2255393160203218562, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1061930531) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2202935 + ... + 2203416.

It is an arithmetic number, because the mean of its divisors is an integer number (266584296).

Almost surely, 2^1061930591 is an apocalyptic number.

1061930591 is a deficient number, since it is larger than the sum of its proper divisors (4406593).

1061930591 is an equidigital number, since it uses as much as digits as its factorization.

1061930591 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4406592.

The product of its (nonzero) digits is 7290, while the sum is 35.

The square root of 1061930591 is about 32587.2765201390. The cubic root of 1061930591 is about 1020.2314581106.

The spelling of 1061930591 in words is "one billion, sixty-one million, nine hundred thirty thousand, five hundred ninety-one".