671126249 has 2 divisors, whose sum is σ = 671126250. Its totient is φ = 671126248.

The previous prime is 671126179. The next prime is 671126263. The reversal of 671126249 is 942621176.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 432640000 + 238486249 = 20800^2 + 15443^2 .

It is a cyclic number.

It is not a de Polignac number, because 671126249 - 2²⁰ = 670077673 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (671126299) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 335563124 + 335563125.

It is an arithmetic number, because the mean of its divisors is an integer number (335563125).

Almost surely, 2^671126249 is an apocalyptic number.

It is an amenable number.

671126249 is a deficient number, since it is larger than the sum of its proper divisors (1).

671126249 is an equidigital number, since it uses as much as digits as its factorization.

671126249 is an evil number, because the sum of its binary digits is even.

The product of its digits is 36288, while the sum is 38.

The square root of 671126249 is about 25906.1044736564. The cubic root of 671126249 is about 875.5240393951.

The spelling of 671126249 in words is "six hundred seventy-one million, one hundred twenty-six thousand, two hundred forty-nine".