2667997 has 4 divisors (see below), whose sum is σ = 2824956. Its totient is φ = 2511040.

The previous prime is 2667989. The next prime is 2668027. The reversal of 2667997 is 7997662.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 7997662 = 2 ⋅3998831.

It can be written as a sum of positive squares in 2 ways, for example, as 1705636 + 962361 = 1306^2 + 981^2 .

It is a cyclic number.

It is not a de Polignac number, because 2667997 - 2³ = 2667989 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2667937) 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 in 3 ways as a sum of consecutive naturals, for example, 78454 + ... + 78487.

It is an arithmetic number, because the mean of its divisors is an integer number (706239).

2^2667997 is an apocalyptic number.

It is an amenable number.

2667997 is a deficient number, since it is larger than the sum of its proper divisors (156959).

2667997 is a wasteful number, since it uses less digits than its factorization.

2667997 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 156958.

The product of its digits is 285768, while the sum is 46.

The square root of 2667997 is about 1633.4004407983. The cubic root of 2667997 is about 138.6953110769.

The spelling of 2667997 in words is "two million, six hundred sixty-seven thousand, nine hundred ninety-seven".