2209991929 has 2 divisors, whose sum is σ = 2209991930. Its totient is φ = 2209991928.

The previous prime is 2209991921. The next prime is 2209991939. The reversal of 2209991929 is 9291999022.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 2187713529 + 22278400 = 46773^2 + 4720^2 .

It is a cyclic number.

It is not a de Polignac number, because 2209991929 - 2³ = 2209991921 is a prime.

It is not a weakly prime, because it can be changed into another prime (2209991921) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1104995964 + 1104995965.

It is an arithmetic number, because the mean of its divisors is an integer number (1104995965).

Almost surely, 2^2209991929 is an apocalyptic number.

It is an amenable number.

2209991929 is a deficient number, since it is larger than the sum of its proper divisors (1).

2209991929 is an equidigital number, since it uses as much as digits as its factorization.

2209991929 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 472392, while the sum is 52.

The square root of 2209991929 is about 47010.5512518201. The cubic root of 2209991929 is about 1302.5574760563.

The spelling of 2209991929 in words is "two billion, two hundred nine million, nine hundred ninety-one thousand, nine hundred twenty-nine".