2170391329 has 2 divisors, whose sum is σ = 2170391330. Its totient is φ = 2170391328.

The previous prime is 2170391281. The next prime is 2170391341. The reversal of 2170391329 is 9231930712.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 2009101329 + 161290000 = 44823^2 + 12700^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2170391329 is a prime.

It is not a weakly prime, because it can be changed into another prime (2170311329) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1085195664 + 1085195665.

It is an arithmetic number, because the mean of its divisors is an integer number (1085195665).

Almost surely, 2^2170391329 is an apocalyptic number.

It is an amenable number.

2170391329 is a deficient number, since it is larger than the sum of its proper divisors (1).

2170391329 is an equidigital number, since it uses as much as digits as its factorization.

2170391329 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 20412, while the sum is 37.

The square root of 2170391329 is about 46587.4589240495. The cubic root of 2170391329 is about 1294.7304098353.

The spelling of 2170391329 in words is "two billion, one hundred seventy million, three hundred ninety-one thousand, three hundred twenty-nine".