641267443 has 2 divisors, whose sum is σ = 641267444. Its totient is φ = 641267442.

The previous prime is 641267437. The next prime is 641267447. The reversal of 641267443 is 344762146.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 641267443 - 2²⁵ = 607713011 is a prime.

It is a super-2 number, since 2×641267443² = 822447866903516498, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (641267447) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 320633721 + 320633722.

It is an arithmetic number, because the mean of its divisors is an integer number (320633722).

Almost surely, 2^641267443 is an apocalyptic number.

641267443 is a deficient number, since it is larger than the sum of its proper divisors (1).

641267443 is an equidigital number, since it uses as much as digits as its factorization.

641267443 is an evil number, because the sum of its binary digits is even.

The product of its digits is 96768, while the sum is 37.

The square root of 641267443 is about 25323.2589332416. The cubic root of 641267443 is about 862.3423807191.

The spelling of 641267443 in words is "six hundred forty-one million, two hundred sixty-seven thousand, four hundred forty-three".