29847416981 has 2 divisors, whose sum is σ = 29847416982. Its totient is φ = 29847416980.

The previous prime is 29847416959. The next prime is 29847416999. The reversal of 29847416981 is 18961474892.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 24714984100 + 5132432881 = 157210^2 + 71641^2 .

It is a cyclic number.

It is not a de Polignac number, because 29847416981 - 2¹⁸ = 29847154837 is a prime.

It is a super-2 number, since 2×29847416981² (a number of 22 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 29847416981.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (29847410981) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14923708490 + 14923708491.

It is an arithmetic number, because the mean of its divisors is an integer number (14923708491).

Almost surely, 2^29847416981 is an apocalyptic number.

It is an amenable number.

29847416981 is a deficient number, since it is larger than the sum of its proper divisors (1).

29847416981 is an equidigital number, since it uses as much as digits as its factorization.

29847416981 is an evil number, because the sum of its binary digits is even.

The product of its digits is 6967296, while the sum is 59.

The spelling of 29847416981 in words is "twenty-nine billion, eight hundred forty-seven million, four hundred sixteen thousand, nine hundred eighty-one".