31728070103 has 2 divisors, whose sum is σ = 31728070104. Its totient is φ = 31728070102.

The previous prime is 31728070097. The next prime is 31728070163. The reversal of 31728070103 is 30107082713.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 31728070103 - 2⁶ = 31728070039 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 31728070103.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (31728070163) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15864035051 + 15864035052.

It is an arithmetic number, because the mean of its divisors is an integer number (15864035052).

Almost surely, 2^31728070103 is an apocalyptic number.

31728070103 is a deficient number, since it is larger than the sum of its proper divisors (1).

31728070103 is an equidigital number, since it uses as much as digits as its factorization.

31728070103 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 7056, while the sum is 32.

The spelling of 31728070103 in words is "thirty-one billion, seven hundred twenty-eight million, seventy thousand, one hundred three".