29979145787 has 2 divisors, whose sum is σ = 29979145788. Its totient is φ = 29979145786.

The previous prime is 29979145753. The next prime is 29979145793. The reversal of 29979145787 is 78754197992.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 29979145787 - 2⁶ = 29979145723 is a prime.

It is not a weakly prime, because it can be changed into another prime (29979145087) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14989572893 + 14989572894.

It is an arithmetic number, because the mean of its divisors is an integer number (14989572894).

Almost surely, 2^29979145787 is an apocalyptic number.

29979145787 is a deficient number, since it is larger than the sum of its proper divisors (1).

29979145787 is an equidigital number, since it uses as much as digits as its factorization.

29979145787 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 80015040, while the sum is 68.

The spelling of 29979145787 in words is "twenty-nine billion, nine hundred seventy-nine million, one hundred forty-five thousand, seven hundred eighty-seven".