2186992649 has 2 divisors, whose sum is σ = 2186992650. Its totient is φ = 2186992648.

The previous prime is 2186992607. The next prime is 2186992657. The reversal of 2186992649 is 9462996812.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1906195600 + 280797049 = 43660^2 + 16757^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2186992649 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 2186992594 and 2186992603.

It is not a weakly prime, because it can be changed into another prime (2186992949) 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 as a sum of consecutive naturals, namely, 1093496324 + 1093496325.

It is an arithmetic number, because the mean of its divisors is an integer number (1093496325).

Almost surely, 2^2186992649 is an apocalyptic number.

It is an amenable number.

2186992649 is a deficient number, since it is larger than the sum of its proper divisors (1).

2186992649 is an equidigital number, since it uses as much as digits as its factorization.

2186992649 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 3359232, while the sum is 56.

The square root of 2186992649 is about 46765.2932098153. The cubic root of 2186992649 is about 1298.0231589573.

The spelling of 2186992649 in words is "two billion, one hundred eighty-six million, nine hundred ninety-two thousand, six hundred forty-nine".