2619661 has 4 divisors (see below), whose sum is σ = 2857824. Its totient is φ = 2381500.

The previous prime is 2619653. The next prime is 2619667. The reversal of 2619661 is 1669162.

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 2619661 - 2³ = 2619653 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 (2619667) 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, 119065 + ... + 119086.

It is an arithmetic number, because the mean of its divisors is an integer number (714456).

2^2619661 is an apocalyptic number.

It is an amenable number.

2619661 is a deficient number, since it is larger than the sum of its proper divisors (238163).

2619661 is a wasteful number, since it uses less digits than its factorization.

2619661 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 238162.

The product of its digits is 3888, while the sum is 31.

The square root of 2619661 is about 1618.5366847866. The cubic root of 2619661 is about 137.8526221913.

The spelling of 2619661 in words is "two million, six hundred nineteen thousand, six hundred sixty-one".