3001561061 has 2 divisors, whose sum is σ = 3001561062. Its totient is φ = 3001561060.

The previous prime is 3001561033. The next prime is 3001561063. The reversal of 3001561061 is 1601651003.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 3001396225 + 164836 = 54785^2 + 406^2 .

It is a cyclic number.

It is not a de Polignac number, because 3001561061 - 2¹⁸ = 3001298917 is a prime.

It is a super-2 number, since 2×3001561061² = 18018737605822891442, which contains 22 as substring.

It is a Sophie Germain prime.

Together with 3001561063, it forms a pair of twin primes.

It is a Chen prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (3001561063) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1500780530 + 1500780531.

It is an arithmetic number, because the mean of its divisors is an integer number (1500780531).

Almost surely, 2^3001561061 is an apocalyptic number.

It is an amenable number.

3001561061 is a deficient number, since it is larger than the sum of its proper divisors (1).

3001561061 is an equidigital number, since it uses as much as digits as its factorization.

3001561061 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 540, while the sum is 23.

The square root of 3001561061 is about 54786.5043692331. The cubic root of 3001561061 is about 1442.4996868801.

The spelling of 3001561061 in words is "three billion, one million, five hundred sixty-one thousand, sixty-one".