2917989 has 12 divisors (see below), whose sum is σ = 4231500. Its totient is φ = 1937664.

The previous prime is 2917973. The next prime is 2918059. The reversal of 2917989 is 9897192.

It can be written as a sum of positive squares in 2 ways, for example, as 887364 + 2030625 = 942^2 + 1425^2 .

It is not a de Polignac number, because 2917989 - 2⁴ = 2917973 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2917909) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 2677 + ... + 3605.

It is an arithmetic number, because the mean of its divisors is an integer number (352625).

2^2917989 is an apocalyptic number.

It is an amenable number.

2917989 is a deficient number, since it is larger than the sum of its proper divisors (1313511).

2917989 is a wasteful number, since it uses less digits than its factorization.

2917989 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1284 (or 1281 counting only the distinct ones).

The product of its digits is 81648, while the sum is 45.

The square root of 2917989 is about 1708.2122233493. The cubic root of 2917989 is about 142.8985702233.

The spelling of 2917989 in words is "two million, nine hundred seventeen thousand, nine hundred eighty-nine".