641471927 has 2 divisors, whose sum is σ = 641471928. Its totient is φ = 641471926.

The previous prime is 641471921. The next prime is 641471947. The reversal of 641471927 is 729174146.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 641471927 - 2⁴ = 641471911 is a prime.

It is a super-2 number, since 2×641471927² = 822972466258186658, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (641471921) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 320735963 + 320735964.

It is an arithmetic number, because the mean of its divisors is an integer number (320735964).

Almost surely, 2^641471927 is an apocalyptic number.

641471927 is a deficient number, since it is larger than the sum of its proper divisors (1).

641471927 is an equidigital number, since it uses as much as digits as its factorization.

641471927 is an evil number, because the sum of its binary digits is even.

The product of its digits is 84672, while the sum is 41.

The square root of 641471927 is about 25327.2960854490. The cubic root of 641471927 is about 862.4340307172.

The spelling of 641471927 in words is "six hundred forty-one million, four hundred seventy-one thousand, nine hundred twenty-seven".