2717991 has 6 divisors (see below), whose sum is σ = 3926000. Its totient is φ = 1811988.

The previous prime is 2717929. The next prime is 2717993. The reversal of 2717991 is 1997172.

It is not a de Polignac number, because 2717991 - 2¹⁸ = 2455847 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 (2717993) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 150991 + ... + 151008.

2^2717991 is an apocalyptic number.

2717991 is a deficient number, since it is larger than the sum of its proper divisors (1208009).

2717991 is a wasteful number, since it uses less digits than its factorization.

2717991 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 302005 (or 302002 counting only the distinct ones).

The product of its digits is 7938, while the sum is 36.

The square root of 2717991 is about 1648.6330701524. The cubic root of 2717991 is about 139.5562651208.

The spelling of 2717991 in words is "two million, seven hundred seventeen thousand, nine hundred ninety-one".