2616991 has 4 divisors (see below), whose sum is σ = 2818312. Its totient is φ = 2415672.

The previous prime is 2616959. The next prime is 2617001. The reversal of 2616991 is 1996162.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 2616991 - 2⁵ = 2616959 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 (2616941) 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, 100641 + ... + 100666.

It is an arithmetic number, because the mean of its divisors is an integer number (704578).

2^2616991 is an apocalyptic number.

2616991 is a deficient number, since it is larger than the sum of its proper divisors (201321).

2616991 is a wasteful number, since it uses less digits than its factorization.

2616991 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 201320.

The product of its digits is 5832, while the sum is 34.

The square root of 2616991 is about 1617.7116553947. The cubic root of 2616991 is about 137.8057724120.

The spelling of 2616991 in words is "two million, six hundred sixteen thousand, nine hundred ninety-one".