2186472389 has 2 divisors, whose sum is σ = 2186472390. Its totient is φ = 2186472388.

The previous prime is 2186472287. The next prime is 2186472451. The reversal of 2186472389 is 9832746812.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1696204225 + 490268164 = 41185^2 + 22142^2 .

It is a cyclic number.

It is not a de Polignac number, because 2186472389 - 2¹² = 2186468293 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2186472689) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1093236194 + 1093236195.

It is an arithmetic number, because the mean of its divisors is an integer number (1093236195).

Almost surely, 2^2186472389 is an apocalyptic number.

It is an amenable number.

2186472389 is a deficient number, since it is larger than the sum of its proper divisors (1).

2186472389 is an equidigital number, since it uses as much as digits as its factorization.

2186472389 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1161216, while the sum is 50.

The square root of 2186472389 is about 46759.7304205232. The cubic root of 2186472389 is about 1297.9202226129.

The spelling of 2186472389 in words is "two billion, one hundred eighty-six million, four hundred seventy-two thousand, three hundred eighty-nine".