2537531993 has 2 divisors, whose sum is σ = 2537531994. Its totient is φ = 2537531992.

The previous prime is 2537531989. The next prime is 2537532073. The reversal of 2537531993 is 3991357352.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1670111689 + 867420304 = 40867^2 + 29452^2 .

It is a cyclic number.

It is not a de Polignac number, because 2537531993 - 2² = 2537531989 is a prime.

It is not a weakly prime, because it can be changed into another prime (2537521993) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1268765996 + 1268765997.

It is an arithmetic number, because the mean of its divisors is an integer number (1268765997).

Almost surely, 2^2537531993 is an apocalyptic number.

It is an amenable number.

2537531993 is a deficient number, since it is larger than the sum of its proper divisors (1).

2537531993 is an equidigital number, since it uses as much as digits as its factorization.

2537531993 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 765450, while the sum is 47.

The square root of 2537531993 is about 50373.9217552098. The cubic root of 2537531993 is about 1363.9669343598.

The spelling of 2537531993 in words is "two billion, five hundred thirty-seven million, five hundred thirty-one thousand, nine hundred ninety-three".