2491235491 has 8 divisors (see below), whose sum is σ = 2508456384. Its totient is φ = 2474073000.

The previous prime is 2491235443. The next prime is 2491235503. The reversal of 2491235491 is 1945321942.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 2491235491 - 2¹⁵ = 2491202723 is a prime.

It is a super-2 number, since 2×2491235491² = 12412508543236022162, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2491230491) 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 7 ways as a sum of consecutive naturals, for example, 72796 + ... + 101398.

It is an arithmetic number, because the mean of its divisors is an integer number (313557048).

Almost surely, 2^2491235491 is an apocalyptic number.

2491235491 is a deficient number, since it is larger than the sum of its proper divisors (17220893).

2491235491 is a wasteful number, since it uses less digits than its factorization.

2491235491 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 29201.

The product of its digits is 77760, while the sum is 40.

The square root of 2491235491 is about 49912.2779584342. The cubic root of 2491235491 is about 1355.6209153937.

The spelling of 2491235491 in words is "two billion, four hundred ninety-one million, two hundred thirty-five thousand, four hundred ninety-one".