641266273 has 2 divisors, whose sum is σ = 641266274. Its totient is φ = 641266272.

The previous prime is 641266201. The next prime is 641266291. The reversal of 641266273 is 372662146.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 409374289 + 231891984 = 20233^2 + 15228^2 .

It is a cyclic number.

It is not a de Polignac number, because 641266273 - 2⁹ = 641265761 is a prime.

It is a super-2 number, since 2×641266273² = 822444865774621058, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (641206273) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 320633136 + 320633137.

It is an arithmetic number, because the mean of its divisors is an integer number (320633137).

Almost surely, 2^641266273 is an apocalyptic number.

It is an amenable number.

641266273 is a deficient number, since it is larger than the sum of its proper divisors (1).

641266273 is an equidigital number, since it uses as much as digits as its factorization.

641266273 is an evil number, because the sum of its binary digits is even.

The product of its digits is 72576, while the sum is 37.

The square root of 641266273 is about 25323.2358319390. The cubic root of 641266273 is about 862.3418562675.

The spelling of 641266273 in words is "six hundred forty-one million, two hundred sixty-six thousand, two hundred seventy-three".