641601047 has 2 divisors, whose sum is σ = 641601048. Its totient is φ = 641601046.

The previous prime is 641601043. The next prime is 641601049. The reversal of 641601047 is 740106146.

641601047 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 is a cyclic number.

It is not a de Polignac number, because 641601047 - 2² = 641601043 is a prime.

It is a super-2 number, since 2×641601047² = 823303807022992418, which contains 22 as substring.

Together with 641601049, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (641601043) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 320800523 + 320800524.

It is an arithmetic number, because the mean of its divisors is an integer number (320800524).

Almost surely, 2^641601047 is an apocalyptic number.

641601047 is a deficient number, since it is larger than the sum of its proper divisors (1).

641601047 is an equidigital number, since it uses as much as digits as its factorization.

641601047 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 4032, while the sum is 29.

The square root of 641601047 is about 25329.8449857081. The cubic root of 641601047 is about 862.4918924394.

The spelling of 641601047 in words is "six hundred forty-one million, six hundred one thousand, forty-seven".