2678993 has 2 divisors, whose sum is σ = 2678994. Its totient is φ = 2678992.

The previous prime is 2678983. The next prime is 2679031. The reversal of 2678993 is 3998762.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 2226064 + 452929 = 1492^2 + 673^2 .

It is a cyclic number.

It is not a de Polignac number, because 2678993 - 2⁸ = 2678737 is a prime.

It is not a weakly prime, because it can be changed into another prime (2678903) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1339496 + 1339497.

It is an arithmetic number, because the mean of its divisors is an integer number (1339497).

2^2678993 is an apocalyptic number.

It is an amenable number.

2678993 is a deficient number, since it is larger than the sum of its proper divisors (1).

2678993 is an equidigital number, since it uses as much as digits as its factorization.

2678993 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 163296, while the sum is 44.

The square root of 2678993 is about 1636.7629639016. The cubic root of 2678993 is about 138.8855915543.

The spelling of 2678993 in words is "two million, six hundred seventy-eight thousand, nine hundred ninety-three".