672781107212987 has 2 divisors, whose sum is σ = 672781107212988. Its totient is φ = 672781107212986.

The previous prime is 672781107212969. The next prime is 672781107213113. The reversal of 672781107212987 is 789212701187276.

672781107212987 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-672781107212987 is a prime.

It is not a weakly prime, because it can be changed into another prime (672781107214987) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 336390553606493 + 336390553606494.

It is an arithmetic number, because the mean of its divisors is an integer number (336390553606494).

Almost surely, 2^{672781107212987} is an apocalyptic number.

672781107212987 is a deficient number, since it is larger than the sum of its proper divisors (1).

672781107212987 is an equidigital number, since it uses as much as digits as its factorization.

672781107212987 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 66382848, while the sum is 68.

The spelling of 672781107212987 in words is "six hundred seventy-two trillion, seven hundred eighty-one billion, one hundred seven million, two hundred twelve thousand, nine hundred eighty-seven".