2172099427 has 2 divisors, whose sum is σ = 2172099428. Its totient is φ = 2172099426.

The previous prime is 2172099421. The next prime is 2172099431. The reversal of 2172099427 is 7249902712.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 2172099427 - 2¹¹ = 2172097379 is a prime.

It is not a weakly prime, because it can be changed into another prime (2172099421) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1086049713 + 1086049714.

It is an arithmetic number, because the mean of its divisors is an integer number (1086049714).

Almost surely, 2^2172099427 is an apocalyptic number.

2172099427 is a deficient number, since it is larger than the sum of its proper divisors (1).

2172099427 is an equidigital number, since it uses as much as digits as its factorization.

2172099427 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 127008, while the sum is 43.

The square root of 2172099427 is about 46605.7874839595. The cubic root of 2172099427 is about 1295.0699717215.

The spelling of 2172099427 in words is "two billion, one hundred seventy-two million, ninety-nine thousand, four hundred twenty-seven".