29539640693 has 2 divisors, whose sum is σ = 29539640694. Its totient is φ = 29539640692.

The previous prime is 29539640633. The next prime is 29539640701. The reversal of 29539640693 is 39604693592.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 28458677809 + 1080962884 = 168697^2 + 32878^2 .

It is a cyclic number.

It is not a de Polignac number, because 29539640693 - 2¹⁶ = 29539575157 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (29539640633) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14769820346 + 14769820347.

It is an arithmetic number, because the mean of its divisors is an integer number (14769820347).

Almost surely, 2^29539640693 is an apocalyptic number.

It is an amenable number.

29539640693 is a deficient number, since it is larger than the sum of its proper divisors (1).

29539640693 is an equidigital number, since it uses as much as digits as its factorization.

29539640693 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 9447840, while the sum is 56.

The spelling of 29539640693 in words is "twenty-nine billion, five hundred thirty-nine million, six hundred forty thousand, six hundred ninety-three".