1058640491 has 4 divisors (see below), whose sum is σ = 1059256632. Its totient is φ = 1058024352.

The previous prime is 1058640463. The next prime is 1058640503. The reversal of 1058640491 is 1940468501.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 1940468501 = 3299 ⋅588199.

It is a cyclic number.

It is not a de Polignac number, because 1058640491 - 2¹⁰ = 1058639467 is a prime.

It is a super-2 number, since 2×1058640491² = 2241439378369442162, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1058640431) 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 3 ways as a sum of consecutive naturals, for example, 305486 + ... + 308931.

It is an arithmetic number, because the mean of its divisors is an integer number (264814158).

Almost surely, 2^1058640491 is an apocalyptic number.

1058640491 is a deficient number, since it is larger than the sum of its proper divisors (616141).

1058640491 is an equidigital number, since it uses as much as digits as its factorization.

1058640491 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 616140.

The product of its (nonzero) digits is 34560, while the sum is 38.

The square root of 1058640491 is about 32536.7559999457. The cubic root of 1058640491 is about 1019.1767325336.

The spelling of 1058640491 in words is "one billion, fifty-eight million, six hundred forty thousand, four hundred ninety-one".