3061391 has 2 divisors, whose sum is σ = 3061392. Its totient is φ = 3061390.

The previous prime is 3061381. The next prime is 3061403. The reversal of 3061391 is 1931603.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-3061391 is a prime.

It is a super-2 number, since 2×3061391² = 18744229709762, which contains 22 as substring.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (3061301) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1530695 + 1530696.

It is an arithmetic number, because the mean of its divisors is an integer number (1530696).

Almost surely, 2^3061391 is an apocalyptic number.

3061391 is a deficient number, since it is larger than the sum of its proper divisors (1).

3061391 is an equidigital number, since it uses as much as digits as its factorization.

3061391 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 486, while the sum is 23.

The square root of 3061391 is about 1749.6831141667. The cubic root of 3061391 is about 145.2021121251.

Adding to 3061391 its reverse (1931603), we get a palindrome (4992994).

The spelling of 3061391 in words is "three million, sixty-one thousand, three hundred ninety-one".