2791031 has 2 divisors, whose sum is σ = 2791032. Its totient is φ = 2791030.

The previous prime is 2791007. The next prime is 2791037. The reversal of 2791031 is 1301972.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2791031 is a prime.

It is a super-2 number, since 2×2791031² = 15579708085922, which contains 22 as substring.

It is an Ulam number.

It is a junction number, because it is equal to n+sod(n) for n = 2790988 and 2791006.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2791037) by changing a digit.

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

It is a good prime.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1395515 + 1395516.

It is an arithmetic number, because the mean of its divisors is an integer number (1395516).

2^2791031 is an apocalyptic number.

2791031 is a deficient number, since it is larger than the sum of its proper divisors (1).

2791031 is an equidigital number, since it uses as much as digits as its factorization.

2791031 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 378, while the sum is 23.

The square root of 2791031 is about 1670.6379021200. The cubic root of 2791031 is about 140.7953202807.

The spelling of 2791031 in words is "two million, seven hundred ninety-one thousand, thirty-one".