6311961 has 6 divisors (see below), whose sum is σ = 9117290. Its totient is φ = 4207968.

The previous prime is 6311957. The next prime is 6311983. The reversal of 6311961 is 1691136.

It can be written as a sum of positive squares in only one way, i.e., 4473225 + 1838736 = 2115^2 + 1356^2 .

It is not a de Polignac number, because 6311961 - 2² = 6311957 is a prime.

It is a Duffinian number.

6311961 is a lucky number.

It is not an unprimeable number, because it can be changed into a prime (6311161) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 350656 + ... + 350673.

Almost surely, 2^6311961 is an apocalyptic number.

It is an amenable number.

6311961 is a deficient number, since it is larger than the sum of its proper divisors (2805329).

6311961 is a wasteful number, since it uses less digits than its factorization.

6311961 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 701335 (or 701332 counting only the distinct ones).

The product of its digits is 972, while the sum is 27.

The square root of 6311961 is about 2512.3616379813. The cubic root of 6311961 is about 184.8082844715.

The spelling of 6311961 in words is "six million, three hundred eleven thousand, nine hundred sixty-one".