671342249 has 2 divisors, whose sum is σ = 671342250. Its totient is φ = 671342248.

The previous prime is 671342209. The next prime is 671342267. The reversal of 671342249 is 942243176.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 667705600 + 3636649 = 25840^2 + 1907^2 .

It is a cyclic number.

It is not a de Polignac number, because 671342249 - 2¹⁶ = 671276713 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (671342209) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 335671124 + 335671125.

It is an arithmetic number, because the mean of its divisors is an integer number (335671125).

Almost surely, 2^671342249 is an apocalyptic number.

It is an amenable number.

671342249 is a deficient number, since it is larger than the sum of its proper divisors (1).

671342249 is an equidigital number, since it uses as much as digits as its factorization.

671342249 is an evil number, because the sum of its binary digits is even.

The product of its digits is 72576, while the sum is 38.

The square root of 671342249 is about 25910.2730398581. The cubic root of 671342249 is about 875.6179575950.

The spelling of 671342249 in words is "six hundred seventy-one million, three hundred forty-two thousand, two hundred forty-nine".