2029781173 has 4 divisors (see below), whose sum is σ = 2319749920. Its totient is φ = 1739812428.

The previous prime is 2029781111. The next prime is 2029781179. The reversal of 2029781173 is 3711879202.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 2029781173 - 2¹³ = 2029772981 is a prime.

It is a super-2 number, since 2×2029781173² = 8240023220530511858, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2029781179) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 144984363 + ... + 144984376.

It is an arithmetic number, because the mean of its divisors is an integer number (579937480).

Almost surely, 2^2029781173 is an apocalyptic number.

It is an amenable number.

2029781173 is a deficient number, since it is larger than the sum of its proper divisors (289968747).

2029781173 is an equidigital number, since it uses as much as digits as its factorization.

2029781173 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 289968746.

The product of its (nonzero) digits is 42336, while the sum is 40.

The square root of 2029781173 is about 45053.0928239117. The cubic root of 2029781173 is about 1266.1439184195.

The spelling of 2029781173 in words is "two billion, twenty-nine million, seven hundred eighty-one thousand, one hundred seventy-three".