30981502693 has 2 divisors, whose sum is σ = 30981502694. Its totient is φ = 30981502692.

The previous prime is 30981502649. The next prime is 30981502787. The reversal of 30981502693 is 39620518903.

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., 29660761729 + 1320740964 = 172223^2 + 36342^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-30981502693 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (30981502613) 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, 15490751346 + 15490751347.

It is an arithmetic number, because the mean of its divisors is an integer number (15490751347).

Almost surely, 2^30981502693 is an apocalyptic number.

It is an amenable number.

30981502693 is a deficient number, since it is larger than the sum of its proper divisors (1).

30981502693 is an equidigital number, since it uses as much as digits as its factorization.

30981502693 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 349920, while the sum is 46.

The spelling of 30981502693 in words is "thirty billion, nine hundred eighty-one million, five hundred two thousand, six hundred ninety-three".