5961981 has 8 divisors (see below), whose sum is σ = 7963360. Its totient is φ = 3967632.

The previous prime is 5961979. The next prime is 5962001. The reversal of 5961981 is 1891695.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 5961981 - 2¹ = 5961979 is a prime.

It is a super-2 number, since 2×5961981² = 71090434888722, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (5961931) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 726 + ... + 3528.

It is an arithmetic number, because the mean of its divisors is an integer number (995420).

Almost surely, 2^5961981 is an apocalyptic number.

It is an amenable number.

5961981 is a deficient number, since it is larger than the sum of its proper divisors (2001379).

5961981 is a wasteful number, since it uses less digits than its factorization.

5961981 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3515.

The product of its digits is 19440, while the sum is 39.

The square root of 5961981 is about 2441.7168140470. The cubic root of 5961981 is about 181.3274396002.

The spelling of 5961981 in words is "five million, nine hundred sixty-one thousand, nine hundred eighty-one".