2646949 has 4 divisors (see below), whose sum is σ = 2676780. Its totient is φ = 2617120.

The previous prime is 2646937. The next prime is 2646967. The reversal of 2646949 is 9496462.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 9496462 = 2 ⋅4748231.

It can be written as a sum of positive squares in 2 ways, for example, as 1476225 + 1170724 = 1215^2 + 1082^2 .

It is a cyclic number.

It is not a de Polignac number, because 2646949 - 2¹⁵ = 2614181 is a prime.

It is a Smith number, since the sum of its digits (40) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is an Ulam number.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2646989) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 14782 + ... + 14959.

It is an arithmetic number, because the mean of its divisors is an integer number (669195).

2^2646949 is an apocalyptic number.

It is an amenable number.

2646949 is a deficient number, since it is larger than the sum of its proper divisors (29831).

2646949 is an equidigital number, since it uses as much as digits as its factorization.

2646949 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 29830.

The product of its digits is 93312, while the sum is 40.

The square root of 2646949 is about 1626.9446825261. The cubic root of 2646949 is about 138.3296223259.

The spelling of 2646949 in words is "two million, six hundred forty-six thousand, nine hundred forty-nine".