672809986349 has 2 divisors, whose sum is σ = 672809986350. Its totient is φ = 672809986348.

The previous prime is 672809986337. The next prime is 672809986363. The reversal of 672809986349 is 943689908276.

672809986349 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 can be written as a sum of positive squares in only one way, i.e., 657064254025 + 15745732324 = 810595^2 + 125482^2 .

It is a cyclic number.

It is not a de Polignac number, because 672809986349 - 2²⁴ = 672793209133 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (672809986319) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 336404993174 + 336404993175.

It is an arithmetic number, because the mean of its divisors is an integer number (336404993175).

Almost surely, 2^672809986349 is an apocalyptic number.

It is an amenable number.

672809986349 is a deficient number, since it is larger than the sum of its proper divisors (1).

672809986349 is an equidigital number, since it uses as much as digits as its factorization.

672809986349 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 282175488, while the sum is 71.

The spelling of 672809986349 in words is "six hundred seventy-two billion, eight hundred nine million, nine hundred eighty-six thousand, three hundred forty-nine".