672784349 has 2 divisors, whose sum is σ = 672784350. Its totient is φ = 672784348.

The previous prime is 672784327. The next prime is 672784379. The reversal of 672784349 is 943487276.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 650760100 + 22024249 = 25510^2 + 4693^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-672784349 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 672784297 and 672784306.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (672784379) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 336392174 + 336392175.

It is an arithmetic number, because the mean of its divisors is an integer number (336392175).

Almost surely, 2^672784349 is an apocalyptic number.

It is an amenable number.

672784349 is a deficient number, since it is larger than the sum of its proper divisors (1).

672784349 is an equidigital number, since it uses as much as digits as its factorization.

672784349 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2032128, while the sum is 50.

The square root of 672784349 is about 25938.0868415541. The cubic root of 672784349 is about 876.2444763772.

The spelling of 672784349 in words is "six hundred seventy-two million, seven hundred eighty-four thousand, three hundred forty-nine".