29999943893 has 2 divisors, whose sum is σ = 29999943894. Its totient is φ = 29999943892.

The previous prime is 29999943871. The next prime is 29999943907. The reversal of 29999943893 is 39834999992.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 29371789924 + 628153969 = 171382^2 + 25063^2 .

It is a cyclic number.

It is not a de Polignac number, because 29999943893 - 2⁶ = 29999943829 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 29999943893.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (29999943803) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14999971946 + 14999971947.

It is an arithmetic number, because the mean of its divisors is an integer number (14999971947).

Almost surely, 2^29999943893 is an apocalyptic number.

It is an amenable number.

29999943893 is a deficient number, since it is larger than the sum of its proper divisors (1).

29999943893 is an equidigital number, since it uses as much as digits as its factorization.

29999943893 is an evil number, because the sum of its binary digits is even.

The product of its digits is 306110016, while the sum is 74.

The spelling of 29999943893 in words is "twenty-nine billion, nine hundred ninety-nine million, nine hundred forty-three thousand, eight hundred ninety-three".