31944099601 has 2 divisors, whose sum is σ = 31944099602. Its totient is φ = 31944099600.

The previous prime is 31944099599. The next prime is 31944099617. The reversal of 31944099601 is 10699044913.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 30059237376 + 1884862225 = 173376^2 + 43415^2 .

It is a cyclic number.

It is not a de Polignac number, because 31944099601 - 2¹ = 31944099599 is a prime.

Together with 31944099599, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (31944099301) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15972049800 + 15972049801.

It is an arithmetic number, because the mean of its divisors is an integer number (15972049801).

Almost surely, 2^31944099601 is an apocalyptic number.

It is an amenable number.

31944099601 is a deficient number, since it is larger than the sum of its proper divisors (1).

31944099601 is an equidigital number, since it uses as much as digits as its factorization.

31944099601 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 209952, while the sum is 46.

The spelling of 31944099601 in words is "thirty-one billion, nine hundred forty-four million, ninety-nine thousand, six hundred one".