641412269 has 2 divisors, whose sum is σ = 641412270. Its totient is φ = 641412268.

The previous prime is 641412263. The next prime is 641412281. The reversal of 641412269 is 962214146.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 641355625 + 56644 = 25325^2 + 238^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-641412269 is a prime.

It is a super-2 number, since 2×641412269² = 822819397647456722, which contains 22 as substring.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (641412263) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 320706134 + 320706135.

It is an arithmetic number, because the mean of its divisors is an integer number (320706135).

Almost surely, 2^641412269 is an apocalyptic number.

It is an amenable number.

641412269 is a deficient number, since it is larger than the sum of its proper divisors (1).

641412269 is an equidigital number, since it uses as much as digits as its factorization.

641412269 is an evil number, because the sum of its binary digits is even.

The product of its digits is 20736, while the sum is 35.

The square root of 641412269 is about 25326.1183168681. The cubic root of 641412269 is about 862.4072939356.

The spelling of 641412269 in words is "six hundred forty-one million, four hundred twelve thousand, two hundred sixty-nine".