2153869829 has 2 divisors, whose sum is σ = 2153869830. Its totient is φ = 2153869828.

The previous prime is 2153869787. The next prime is 2153869897. The reversal of 2153869829 is 9289683512.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1944633604 + 209236225 = 44098^2 + 14465^2 .

It is a cyclic number.

It is not a de Polignac number, because 2153869829 - 2⁸ = 2153869573 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2153899829) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1076934914 + 1076934915.

It is an arithmetic number, because the mean of its divisors is an integer number (1076934915).

Almost surely, 2^2153869829 is an apocalyptic number.

It is an amenable number.

2153869829 is a deficient number, since it is larger than the sum of its proper divisors (1).

2153869829 is an equidigital number, since it uses as much as digits as its factorization.

2153869829 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1866240, while the sum is 53.

The square root of 2153869829 is about 46409.8031562298. The cubic root of 2153869829 is about 1291.4367800513.

The spelling of 2153869829 in words is "two billion, one hundred fifty-three million, eight hundred sixty-nine thousand, eight hundred twenty-nine".