2491712057 has 2 divisors, whose sum is σ = 2491712058. Its totient is φ = 2491712056.

The previous prime is 2491712039. The next prime is 2491712063. The reversal of 2491712057 is 7502171942.

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., 2349243961 + 142468096 = 48469^2 + 11936^2 .

It is a cyclic number.

It is not a de Polignac number, because 2491712057 - 2⁸ = 2491711801 is a prime.

It is a super-3 number, since 3×2491712057³ (a number of 29 digits) contains 333 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 2491712057.

It is not a weakly prime, because it can be changed into another prime (2491712257) 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 as a sum of consecutive naturals, namely, 1245856028 + 1245856029.

It is an arithmetic number, because the mean of its divisors is an integer number (1245856029).

Almost surely, 2^2491712057 is an apocalyptic number.

It is an amenable number.

2491712057 is a deficient number, since it is larger than the sum of its proper divisors (1).

2491712057 is an equidigital number, since it uses as much as digits as its factorization.

2491712057 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 35280, while the sum is 38.

The square root of 2491712057 is about 49917.0517659046. The cubic root of 2491712057 is about 1355.7073519762.

Adding to 2491712057 its reverse (7502171942), we get a palindrome (9993883999).

The spelling of 2491712057 in words is "two billion, four hundred ninety-one million, seven hundred twelve thousand, fifty-seven".