2609961 has 8 divisors (see below), whose sum is σ = 3511200. Its totient is φ = 1724352.

The previous prime is 2609953. The next prime is 2609963. The reversal of 2609961 is 1699062.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 2609961 - 2³ = 2609953 is a prime.

It is a super-3 number, since 3×2609961³ = 53336351988628112043, which contains 333 as substring.

It is not an unprimeable number, because it can be changed into a prime (2609963) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3511 + ... + 4188.

It is an arithmetic number, because the mean of its divisors is an integer number (438900).

2^2609961 is an apocalyptic number.

It is an amenable number.

2609961 is a deficient number, since it is larger than the sum of its proper divisors (901239).

2609961 is a wasteful number, since it uses less digits than its factorization.

2609961 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7815.

The product of its (nonzero) digits is 5832, while the sum is 33.

The square root of 2609961 is about 1615.5373718983. The cubic root of 2609961 is about 137.6822662750.

It can be divided in two parts, 2609 and 961, that added together give a triangular number (3570 = T₈₄).

The spelling of 2609961 in words is "two million, six hundred nine thousand, nine hundred sixty-one".