2029939091 has 4 divisors (see below), whose sum is σ = 2038432800. Its totient is φ = 2021445384.

The previous prime is 2029939033. The next prime is 2029939097. The reversal of 2029939091 is 1909399202.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 2029939091 - 2¹⁸ = 2029676947 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2029939097) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4246496 + ... + 4246973.

It is an arithmetic number, because the mean of its divisors is an integer number (509608200).

Almost surely, 2^2029939091 is an apocalyptic number.

2029939091 is a deficient number, since it is larger than the sum of its proper divisors (8493709).

2029939091 is an equidigital number, since it uses as much as digits as its factorization.

2029939091 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8493708.

The product of its (nonzero) digits is 78732, while the sum is 44.

The square root of 2029939091 is about 45054.8453665086. The cubic root of 2029939091 is about 1266.1767531133.

The spelling of 2029939091 in words is "two billion, twenty-nine million, nine hundred thirty-nine thousand, ninety-one".