2609949 has 4 divisors (see below), whose sum is σ = 3479936. Its totient is φ = 1739964.

The previous prime is 2609947. The next prime is 2609953. The reversal of 2609949 is 9499062.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 2609949 - 2¹ = 2609947 is a prime.

It is a super-3 number, since 3×2609949³ = 53335616307197092047, which contains 333 as substring.

It is a D-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 (2609947) 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, 434989 + ... + 434994.

It is an arithmetic number, because the mean of its divisors is an integer number (869984).

2^2609949 is an apocalyptic number.

It is an amenable number.

2609949 is a deficient number, since it is larger than the sum of its proper divisors (869987).

2609949 is an equidigital number, since it uses as much as digits as its factorization.

2609949 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 869986.

The product of its (nonzero) digits is 34992, while the sum is 39.

The square root of 2609949 is about 1615.5336579595. The cubic root of 2609949 is about 137.6820552642.

It can be divided in two parts, 260994 and 9, that added together give a triangular number (261003 = T₇₂₂).

The spelling of 2609949 in words is "two million, six hundred nine thousand, nine hundred forty-nine".