6537961 has 4 divisors (see below), whose sum is σ = 6620800. Its totient is φ = 6455124.

The previous prime is 6537959. The next prime is 6537977. The reversal of 6537961 is 1697356.

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 6537961 - 2¹ = 6537959 is a prime.

It is a Duffinian number.

6537961 is a lucky number.

It is a self number, because there is not a number n which added to its sum of digits gives 6537961.

It is not an unprimeable number, because it can be changed into a prime (6537941) 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, 41301 + ... + 41458.

It is an arithmetic number, because the mean of its divisors is an integer number (1655200).

Almost surely, 2^6537961 is an apocalyptic number.

6537961 is the 1144-th centered decagonal number.

It is an amenable number.

6537961 is a deficient number, since it is larger than the sum of its proper divisors (82839).

6537961 is an equidigital number, since it uses as much as digits as its factorization.

6537961 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 82838.

The product of its digits is 34020, while the sum is 37.

The square root of 6537961 is about 2556.9436833845. The cubic root of 6537961 is about 186.9881601929.

The spelling of 6537961 in words is "six million, five hundred thirty-seven thousand, nine hundred sixty-one".