3061981 has 4 divisors (see below), whose sum is σ = 3297532. Its totient is φ = 2826432.

The previous prime is 3061973. The next prime is 3061991. The reversal of 3061981 is 1891603.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 1891603 = 7 ⋅270229.

It can be written as a sum of positive squares in 2 ways, for example, as 202500 + 2859481 = 450^2 + 1691^2 .

It is a cyclic number.

It is not a de Polignac number, because 3061981 - 2³ = 3061973 is a prime.

It is a super-2 number, since 2×3061981² = 18751455288722, 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 (3061931) 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, 117756 + ... + 117781.

It is an arithmetic number, because the mean of its divisors is an integer number (824383).

Almost surely, 2^3061981 is an apocalyptic number.

It is an amenable number.

3061981 is a deficient number, since it is larger than the sum of its proper divisors (235551).

3061981 is a wasteful number, since it uses less digits than its factorization.

3061981 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 235550.

The product of its (nonzero) digits is 1296, while the sum is 28.

The square root of 3061981 is about 1749.8517080027. The cubic root of 3061981 is about 145.2114394476.

The spelling of 3061981 in words is "three million, sixty-one thousand, nine hundred eighty-one".