2957681729 has 4 divisors (see below), whose sum is σ = 2970375876. Its totient is φ = 2944987584.

The previous prime is 2957681707. The next prime is 2957681767. The reversal of 2957681729 is 9271867592.

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

It can be written as a sum of positive squares in 2 ways, for example, as 1579267600 + 1378414129 = 39740^2 + 37127^2 .

It is a cyclic number.

It is not a de Polignac number, because 2957681729 - 2¹² = 2957677633 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2957681429) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6346724 + ... + 6347189.

It is an arithmetic number, because the mean of its divisors is an integer number (742593969).

Almost surely, 2^2957681729 is an apocalyptic number.

It is an amenable number.

2957681729 is a deficient number, since it is larger than the sum of its proper divisors (12694147).

2957681729 is a wasteful number, since it uses less digits than its factorization.

2957681729 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12694146.

The product of its digits is 3810240, while the sum is 56.

The square root of 2957681729 is about 54384.5725275100. The cubic root of 2957681729 is about 1435.4359303161.

The spelling of 2957681729 in words is "two billion, nine hundred fifty-seven million, six hundred eighty-one thousand, seven hundred twenty-nine".