641272693 has 2 divisors, whose sum is σ = 641272694. Its totient is φ = 641272692.

The previous prime is 641272663. The next prime is 641272699. The reversal of 641272693 is 396272146.

It is a happy number.

641272693 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 582643044 + 58629649 = 24138^2 + 7657^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-641272693 is a prime.

It is a super-3 number, since 3×641272693³ (a number of 27 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (641272699) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 320636346 + 320636347.

It is an arithmetic number, because the mean of its divisors is an integer number (320636347).

Almost surely, 2^641272693 is an apocalyptic number.

It is an amenable number.

641272693 is a deficient number, since it is larger than the sum of its proper divisors (1).

641272693 is an equidigital number, since it uses as much as digits as its factorization.

641272693 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 108864, while the sum is 40.

The square root of 641272693 is about 25323.3625926732. The cubic root of 641272693 is about 862.3447340197.

The spelling of 641272693 in words is "six hundred forty-one million, two hundred seventy-two thousand, six hundred ninety-three".