641161343 has 2 divisors, whose sum is σ = 641161344. Its totient is φ = 641161342.

The previous prime is 641161337. The next prime is 641161379. The reversal of 641161343 is 343161146.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 641161343 - 2¹² = 641157247 is a prime.

It is a super-2 number, since 2×641161343² = 822175735515127298, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (641161303) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 320580671 + 320580672.

It is an arithmetic number, because the mean of its divisors is an integer number (320580672).

Almost surely, 2^641161343 is an apocalyptic number.

641161343 is a deficient number, since it is larger than the sum of its proper divisors (1).

641161343 is an equidigital number, since it uses as much as digits as its factorization.

641161343 is an evil number, because the sum of its binary digits is even.

The product of its digits is 5184, while the sum is 29.

The square root of 641161343 is about 25321.1639345430. The cubic root of 641161343 is about 862.2948188820.

The spelling of 641161343 in words is "six hundred forty-one million, one hundred sixty-one thousand, three hundred forty-three".