2057320729 has 2 divisors, whose sum is σ = 2057320730. Its totient is φ = 2057320728.

The previous prime is 2057320679. The next prime is 2057320763. The reversal of 2057320729 is 9270237502.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1982030400 + 75290329 = 44520^2 + 8677^2 .

It is a cyclic number.

It is not a de Polignac number, because 2057320729 - 2¹⁵ = 2057287961 is a prime.

It is not a weakly prime, because it can be changed into another prime (2057320129) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1028660364 + 1028660365.

It is an arithmetic number, because the mean of its divisors is an integer number (1028660365).

Almost surely, 2^2057320729 is an apocalyptic number.

It is an amenable number.

2057320729 is a deficient number, since it is larger than the sum of its proper divisors (1).

2057320729 is an equidigital number, since it uses as much as digits as its factorization.

2057320729 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 52920, while the sum is 37.

The square root of 2057320729 is about 45357.6975716361. The cubic root of 2057320729 is about 1271.8444543081.

The spelling of 2057320729 in words is "two billion, fifty-seven million, three hundred twenty thousand, seven hundred twenty-nine".