2931997 has 2 divisors, whose sum is σ = 2931998. Its totient is φ = 2931996.

The previous prime is 2931983. The next prime is 2932003. The reversal of 2931997 is 7991392.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 2842596 + 89401 = 1686^2 + 299^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2931997 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2931197) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1465998 + 1465999.

It is an arithmetic number, because the mean of its divisors is an integer number (1465999).

2^2931997 is an apocalyptic number.

It is an amenable number.

2931997 is a deficient number, since it is larger than the sum of its proper divisors (1).

2931997 is an equidigital number, since it uses as much as digits as its factorization.

2931997 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 30618, while the sum is 40.

The square root of 2931997 is about 1712.3075074297. The cubic root of 2931997 is about 143.1268699819.

The spelling of 2931997 in words is "two million, nine hundred thirty-one thousand, nine hundred ninety-seven".