671727253 has 2 divisors, whose sum is σ = 671727254. Its totient is φ = 671727252.

The previous prime is 671727227. The next prime is 671727263. The reversal of 671727253 is 352727176.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 529092004 + 142635249 = 23002^2 + 11943^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-671727253 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (671727223) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 335863626 + 335863627.

It is an arithmetic number, because the mean of its divisors is an integer number (335863627).

Almost surely, 2^671727253 is an apocalyptic number.

It is an amenable number.

671727253 is a deficient number, since it is larger than the sum of its proper divisors (1).

671727253 is an equidigital number, since it uses as much as digits as its factorization.

671727253 is an evil number, because the sum of its binary digits is even.

The product of its digits is 123480, while the sum is 40.

The square root of 671727253 is about 25917.7015377521. The cubic root of 671727253 is about 875.7853098874.

The spelling of 671727253 in words is "six hundred seventy-one million, seven hundred twenty-seven thousand, two hundred fifty-three".