16723205987 has 2 divisors, whose sum is σ = 16723205988. Its totient is φ = 16723205986.

The previous prime is 16723205977. The next prime is 16723206043. The reversal of 16723205987 is 78950232761.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 16723205987 - 2⁶ = 16723205923 is a prime.

It is not a weakly prime, because it can be changed into another prime (16723205977) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8361602993 + 8361602994.

It is an arithmetic number, because the mean of its divisors is an integer number (8361602994).

Almost surely, 2^16723205987 is an apocalyptic number.

16723205987 is a deficient number, since it is larger than the sum of its proper divisors (1).

16723205987 is an equidigital number, since it uses as much as digits as its factorization.

16723205987 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1270080, while the sum is 50.

The spelling of 16723205987 in words is "sixteen billion, seven hundred twenty-three million, two hundred five thousand, nine hundred eighty-seven".