2891630057 has 2 divisors, whose sum is σ = 2891630058. Its totient is φ = 2891630056.

The previous prime is 2891630051. The next prime is 2891630087. The reversal of 2891630057 is 7500361982.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 2718996736 + 172633321 = 52144^2 + 13139^2 .

It is a cyclic number.

It is not a de Polignac number, because 2891630057 - 2²² = 2887435753 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 2891629996 and 2891630023.

It is not a weakly prime, because it can be changed into another prime (2891630051) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1445815028 + 1445815029.

It is an arithmetic number, because the mean of its divisors is an integer number (1445815029).

Almost surely, 2^2891630057 is an apocalyptic number.

It is an amenable number.

2891630057 is a deficient number, since it is larger than the sum of its proper divisors (1).

2891630057 is an equidigital number, since it uses as much as digits as its factorization.

2891630057 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 90720, while the sum is 41.

The square root of 2891630057 is about 53773.8789469385. The cubic root of 2891630057 is about 1424.6698826153.

The spelling of 2891630057 in words is "two billion, eight hundred ninety-one million, six hundred thirty thousand, fifty-seven".