2667989 has 2 divisors, whose sum is σ = 2667990. Its totient is φ = 2667988.

The previous prime is 2667983. The next prime is 2668027. The reversal of 2667989 is 9897662.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 2235025 + 432964 = 1495^2 + 658^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2667989 is a prime.

It is a Chen prime.

It is an Ulam number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2667983) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1333994 + 1333995.

It is an arithmetic number, because the mean of its divisors is an integer number (1333995).

2^2667989 is an apocalyptic number.

It is an amenable number.

2667989 is a deficient number, since it is larger than the sum of its proper divisors (1).

2667989 is an equidigital number, since it uses as much as digits as its factorization.

2667989 is an evil number, because the sum of its binary digits is even.

The product of its digits is 326592, while the sum is 47.

The square root of 2667989 is about 1633.3979919175. The cubic root of 2667989 is about 138.6951724506.

The spelling of 2667989 in words is "two million, six hundred sixty-seven thousand, nine hundred eighty-nine".