2815997 has 2 divisors, whose sum is σ = 2815998. Its totient is φ = 2815996.

The previous prime is 2815993. The next prime is 2816017. The reversal of 2815997 is 7995182.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 2627641 + 188356 = 1621^2 + 434^2 .

It is a cyclic number.

It is not a de Polignac number, because 2815997 - 2² = 2815993 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2815993) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1407998 + 1407999.

It is an arithmetic number, because the mean of its divisors is an integer number (1407999).

2^2815997 is an apocalyptic number.

It is an amenable number.

2815997 is a deficient number, since it is larger than the sum of its proper divisors (1).

2815997 is an equidigital number, since it uses as much as digits as its factorization.

2815997 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 45360, while the sum is 41.

The square root of 2815997 is about 1678.0932632008. The cubic root of 2815997 is about 141.2138832660.

The spelling of 2815997 in words is "two million, eight hundred fifteen thousand, nine hundred ninety-seven".