2190087 has 6 divisors (see below), whose sum is σ = 3163472. Its totient is φ = 1460052.

The previous prime is 2190079. The next prime is 2190091. The reversal of 2190087 is 7800912.

It is not a de Polignac number, because 2190087 - 2³ = 2190079 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 2190087.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2190017) 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, 121663 + ... + 121680.

2^2190087 is an apocalyptic number.

2190087 is a deficient number, since it is larger than the sum of its proper divisors (973385).

2190087 is a wasteful number, since it uses less digits than its factorization.

2190087 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 243349 (or 243346 counting only the distinct ones).

The product of its (nonzero) digits is 1008, while the sum is 27.

The square root of 2190087 is about 1479.8942529789. The cubic root of 2190087 is about 129.8635056522.

Adding to 2190087 its reverse (7800912), we get a palindrome (9990999).

The spelling of 2190087 in words is "two million, one hundred ninety thousand, eighty-seven".