331797537949 has 2 divisors, whose sum is σ = 331797537950. Its totient is φ = 331797537948.

The previous prime is 331797537937. The next prime is 331797537971. The reversal of 331797537949 is 949735797133.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 264111710724 + 67685827225 = 513918^2 + 260165^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-331797537949 is a prime.

It is a super-2 number, since 2×331797537949² (a number of 24 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (331797537979) 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, 165898768974 + 165898768975.

It is an arithmetic number, because the mean of its divisors is an integer number (165898768975).

Almost surely, 2^331797537949 is an apocalyptic number.

It is an amenable number.

331797537949 is a deficient number, since it is larger than the sum of its proper divisors (1).

331797537949 is an equidigital number, since it uses as much as digits as its factorization.

331797537949 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 135025380, while the sum is 67.

The spelling of 331797537949 in words is "three hundred thirty-one billion, seven hundred ninety-seven million, five hundred thirty-seven thousand, nine hundred forty-nine".