1631534137 has 2 divisors, whose sum is σ = 1631534138. Its totient is φ = 1631534136.

The previous prime is 1631534117. The next prime is 1631534153. The reversal of 1631534137 is 7314351361.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1143521856 + 488012281 = 33816^2 + 22091^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1631534137 is a prime.

It is not a weakly prime, because it can be changed into another prime (1631534117) 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, 815767068 + 815767069.

It is an arithmetic number, because the mean of its divisors is an integer number (815767069).

Almost surely, 2^1631534137 is an apocalyptic number.

It is an amenable number.

1631534137 is a deficient number, since it is larger than the sum of its proper divisors (1).

1631534137 is an equidigital number, since it uses as much as digits as its factorization.

1631534137 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 22680, while the sum is 34.

The square root of 1631534137 is about 40392.2534281018. The cubic root of 1631534137 is about 1177.2410255033.

Adding to 1631534137 its reverse (7314351361), we get a palindrome (8945885498).

The spelling of 1631534137 in words is "one billion, six hundred thirty-one million, five hundred thirty-four thousand, one hundred thirty-seven".