2987917 has 4 divisors (see below), whose sum is σ = 3024000. Its totient is φ = 2951836.

The previous prime is 2987911. The next prime is 2987923. The reversal of 2987917 is 7197892.

It is a happy number.

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 an interprime number because it is at equal distance from previous prime (2987911) and next prime (2987923).

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2987917 is a prime.

It is a Duffinian number.

2987917 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2987911) 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, 17917 + ... + 18082.

It is an arithmetic number, because the mean of its divisors is an integer number (756000).

2^2987917 is an apocalyptic number.

It is an amenable number.

2987917 is a deficient number, since it is larger than the sum of its proper divisors (36083).

2987917 is an equidigital number, since it uses as much as digits as its factorization.

2987917 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 36082.

The product of its digits is 63504, while the sum is 43.

The square root of 2987917 is about 1728.5592266393. The cubic root of 2987917 is about 144.0310664711.

The spelling of 2987917 in words is "two million, nine hundred eighty-seven thousand, nine hundred seventeen".