2149668361 has 2 divisors, whose sum is σ = 2149668362. Its totient is φ = 2149668360.

The previous prime is 2149668347. The next prime is 2149668373. The reversal of 2149668361 is 1638669412.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 2018794761 + 130873600 = 44931^2 + 11440^2 .

It is a cyclic number.

It is not a de Polignac number, because 2149668361 - 2⁵ = 2149668329 is a prime.

It is not a weakly prime, because it can be changed into another prime (2149663361) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1074834180 + 1074834181.

It is an arithmetic number, because the mean of its divisors is an integer number (1074834181).

Almost surely, 2^2149668361 is an apocalyptic number.

It is an amenable number.

2149668361 is a deficient number, since it is larger than the sum of its proper divisors (1).

2149668361 is an equidigital number, since it uses as much as digits as its factorization.

2149668361 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 373248, while the sum is 46.

The square root of 2149668361 is about 46364.5161842545. The cubic root of 2149668361 is about 1290.5965153783.

The spelling of 2149668361 in words is "two billion, one hundred forty-nine million, six hundred sixty-eight thousand, three hundred sixty-one".