641174447 has 2 divisors, whose sum is σ = 641174448. Its totient is φ = 641174446.

The previous prime is 641174411. The next prime is 641174449. The reversal of 641174447 is 744471146.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 641174447 - 2¹⁸ = 640912303 is a prime.

It is a super-2 number, since 2×641174447² = 822209342971511618, which contains 22 as substring.

Together with 641174449, it forms a pair of twin primes.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 641174447.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (641174449) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 320587223 + 320587224.

It is an arithmetic number, because the mean of its divisors is an integer number (320587224).

Almost surely, 2^641174447 is an apocalyptic number.

641174447 is a deficient number, since it is larger than the sum of its proper divisors (1).

641174447 is an equidigital number, since it uses as much as digits as its factorization.

641174447 is an evil number, because the sum of its binary digits is even.

The product of its digits is 75264, while the sum is 38.

The square root of 641174447 is about 25321.4226890987. The cubic root of 641174447 is about 862.3006933442.

The spelling of 641174447 in words is "six hundred forty-one million, one hundred seventy-four thousand, four hundred forty-seven".