29679997693 has 2 divisors, whose sum is σ = 29679997694. Its totient is φ = 29679997692.

The previous prime is 29679997687. The next prime is 29679997751. The reversal of 29679997693 is 39679997692.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 23464725124 + 6215272569 = 153182^2 + 78837^2 .

It is a cyclic number.

It is not a de Polignac number, because 29679997693 - 2⁵ = 29679997661 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (29679997643) 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, 14839998846 + 14839998847.

It is an arithmetic number, because the mean of its divisors is an integer number (14839998847).

Almost surely, 2^29679997693 is an apocalyptic number.

It is an amenable number.

29679997693 is a deficient number, since it is larger than the sum of its proper divisors (1).

29679997693 is an equidigital number, since it uses as much as digits as its factorization.

29679997693 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 624974616, while the sum is 76.

Subtracting 29679997693 from its reverse (39679997692), we obtain a palindrome (9999999999).

The spelling of 29679997693 in words is "twenty-nine billion, six hundred seventy-nine million, nine hundred ninety-seven thousand, six hundred ninety-three".