3061991 has 2 divisors, whose sum is σ = 3061992. Its totient is φ = 3061990.

The previous prime is 3061973. The next prime is 3061997. The reversal of 3061991 is 1991603.

It is a strong prime.

It is an emirp because it is prime and its reverse (1991603) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 3061991 - 2¹⁸ = 2799847 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (3061997) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1530995 + 1530996.

It is an arithmetic number, because the mean of its divisors is an integer number (1530996).

Almost surely, 2^3061991 is an apocalyptic number.

3061991 is a deficient number, since it is larger than the sum of its proper divisors (1).

3061991 is an equidigital number, since it uses as much as digits as its factorization.

3061991 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1458, while the sum is 29.

The square root of 3061991 is about 1749.8545653854. The cubic root of 3061991 is about 145.2115975275.

The spelling of 3061991 in words is "three million, sixty-one thousand, nine hundred ninety-one".