3261340491 has 4 divisors (see below), whose sum is σ = 4348453992. Its totient is φ = 2174226992.

The previous prime is 3261340487. The next prime is 3261340549. The reversal of 3261340491 is 1940431623.

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 3261340491 - 2² = 3261340487 is a prime.

It is a super-2 number, since 2×3261340491² = 21272683596472242162, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (3261340421) 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, 543556746 + ... + 543556751.

It is an arithmetic number, because the mean of its divisors is an integer number (1087113498).

Almost surely, 2^3261340491 is an apocalyptic number.

3261340491 is a deficient number, since it is larger than the sum of its proper divisors (1087113501).

3261340491 is a wasteful number, since it uses less digits than its factorization.

3261340491 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1087113500.

The product of its (nonzero) digits is 15552, while the sum is 33.

The square root of 3261340491 is about 57108.1473259289. The cubic root of 3261340491 is about 1482.9689141507.

The spelling of 3261340491 in words is "three billion, two hundred sixty-one million, three hundred forty thousand, four hundred ninety-one".