29977777993 has 2 divisors, whose sum is σ = 29977777994. Its totient is φ = 29977777992.

The previous prime is 29977777987. The next prime is 29977778003. The reversal of 29977777993 is 39977777992.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 24377201424 + 5600576569 = 156132^2 + 74837^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-29977777993 is a prime.

It is not a weakly prime, because it can be changed into another prime (29977777393) 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, 14988888996 + 14988888997.

It is an arithmetic number, because the mean of its divisors is an integer number (14988888997).

Almost surely, 2^29977777993 is an apocalyptic number.

It is an amenable number.

29977777993 is a deficient number, since it is larger than the sum of its proper divisors (1).

29977777993 is an equidigital number, since it uses as much as digits as its factorization.

29977777993 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 661624362, while the sum is 76.

Subtracting 29977777993 from its reverse (39977777992), we obtain a palindrome (9999999999).

The spelling of 29977777993 in words is "twenty-nine billion, nine hundred seventy-seven million, seven hundred seventy-seven thousand, nine hundred ninety-three".