641514277 has 2 divisors, whose sum is σ = 641514278. Its totient is φ = 641514276.

The previous prime is 641514259. The next prime is 641514281. The reversal of 641514277 is 772415146.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 606833956 + 34680321 = 24634^2 + 5889^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-641514277 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (641514287) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 320757138 + 320757139.

It is an arithmetic number, because the mean of its divisors is an integer number (320757139).

Almost surely, 2^641514277 is an apocalyptic number.

It is an amenable number.

641514277 is a deficient number, since it is larger than the sum of its proper divisors (1).

641514277 is an equidigital number, since it uses as much as digits as its factorization.

641514277 is an evil number, because the sum of its binary digits is even.

The product of its digits is 47040, while the sum is 37.

The square root of 641514277 is about 25328.1321261557. The cubic root of 641514277 is about 862.4530096082.

The spelling of 641514277 in words is "six hundred forty-one million, five hundred fourteen thousand, two hundred seventy-seven".