537081491 has 4 divisors (see below), whose sum is σ = 537966912. Its totient is φ = 536196072.

The previous prime is 537081469. The next prime is 537081497. The reversal of 537081491 is 194180735.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-537081491 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (537081497) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 441800 + ... + 443013.

It is an arithmetic number, because the mean of its divisors is an integer number (134491728).

Almost surely, 2^537081491 is an apocalyptic number.

537081491 is a deficient number, since it is larger than the sum of its proper divisors (885421).

537081491 is an equidigital number, since it uses as much as digits as its factorization.

537081491 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 885420.

The product of its (nonzero) digits is 30240, while the sum is 38.

The square root of 537081491 is about 23175.0186839191. The cubic root of 537081491 is about 812.8555873461.

The spelling of 537081491 in words is "five hundred thirty-seven million, eighty-one thousand, four hundred ninety-one".