2187613 has 2 divisors, whose sum is σ = 2187614. Its totient is φ = 2187612.

The previous prime is 2187587. The next prime is 2187629. The reversal of 2187613 is 3167812.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 2181529 + 6084 = 1477^2 + 78^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2187613 is a prime.

It is an Ulam number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2187683) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1093806 + 1093807.

It is an arithmetic number, because the mean of its divisors is an integer number (1093807).

2^2187613 is an apocalyptic number.

It is an amenable number.

2187613 is a deficient number, since it is larger than the sum of its proper divisors (1).

2187613 is an equidigital number, since it uses as much as digits as its factorization.

2187613 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2016, while the sum is 28.

The square root of 2187613 is about 1479.0581462539. The cubic root of 2187613 is about 129.8145877529.

The spelling of 2187613 in words is "two million, one hundred eighty-seven thousand, six hundred thirteen".