29987278973 has 2 divisors, whose sum is σ = 29987278974. Its totient is φ = 29987278972.

The previous prime is 29987278943. The next prime is 29987279033. The reversal of 29987278973 is 37987278992.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 20585649529 + 9401629444 = 143477^2 + 96962^2 .

It is a cyclic number.

It is not a de Polignac number, because 29987278973 - 2¹⁰ = 29987277949 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 29987278897 and 29987278906.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (29987278943) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14993639486 + 14993639487.

It is an arithmetic number, because the mean of its divisors is an integer number (14993639487).

Almost surely, 2^29987278973 is an apocalyptic number.

It is an amenable number.

29987278973 is a deficient number, since it is larger than the sum of its proper divisors (1).

29987278973 is an equidigital number, since it uses as much as digits as its factorization.

29987278973 is an evil number, because the sum of its binary digits is even.

The product of its digits is 192036096, while the sum is 71.

The spelling of 29987278973 in words is "twenty-nine billion, nine hundred eighty-seven million, two hundred seventy-eight thousand, nine hundred seventy-three".