537939661 has 4 divisors (see below), whose sum is σ = 614788192. Its totient is φ = 461091132.

The previous prime is 537939643. The next prime is 537939667. The reversal of 537939661 is 166939735.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 537939661 - 2⁵ = 537939629 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (537939667) 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, 38424255 + ... + 38424268.

It is an arithmetic number, because the mean of its divisors is an integer number (153697048).

Almost surely, 2^537939661 is an apocalyptic number.

It is an amenable number.

537939661 is a deficient number, since it is larger than the sum of its proper divisors (76848531).

537939661 is an equidigital number, since it uses as much as digits as its factorization.

537939661 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 76848530.

The product of its digits is 918540, while the sum is 49.

The square root of 537939661 is about 23193.5262735100. The cubic root of 537939661 is about 813.2882945401.

The spelling of 537939661 in words is "five hundred thirty-seven million, nine hundred thirty-nine thousand, six hundred sixty-one".