2608991 has 16 divisors (see below), whose sum is σ = 3360768. Its totient is φ = 1965600.

The previous prime is 2608951. The next prime is 2608993. The reversal of 2608991 is 1998062.

It is not a de Polignac number, because 2608991 - 2¹⁸ = 2346847 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 (2608993) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1841 + ... + 2933.

It is an arithmetic number, because the mean of its divisors is an integer number (210048).

2^2608991 is an apocalyptic number.

2608991 is a deficient number, since it is larger than the sum of its proper divisors (751777).

2608991 is a wasteful number, since it uses less digits than its factorization.

2608991 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1142.

The product of its (nonzero) digits is 7776, while the sum is 35.

The square root of 2608991 is about 1615.2371342933. The cubic root of 2608991 is about 137.6652074828.

The spelling of 2608991 in words is "two million, six hundred eight thousand, nine hundred ninety-one".