641161379 has 2 divisors, whose sum is σ = 641161380. Its totient is φ = 641161378.

The previous prime is 641161343. The next prime is 641161387. The reversal of 641161379 is 973161146.

It is a happy number.

641161379 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 641161379 - 2¹⁶ = 641095843 is a prime.

It is a super-2 number, since 2×641161379² = 822175827842363282, which contains 22 as substring.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (641161309) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 320580689 + 320580690.

It is an arithmetic number, because the mean of its divisors is an integer number (320580690).

Almost surely, 2^641161379 is an apocalyptic number.

641161379 is a deficient number, since it is larger than the sum of its proper divisors (1).

641161379 is an equidigital number, since it uses as much as digits as its factorization.

641161379 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 27216, while the sum is 38.

The square root of 641161379 is about 25321.1646454108. The cubic root of 641161379 is about 862.2948350207.

The spelling of 641161379 in words is "six hundred forty-one million, one hundred sixty-one thousand, three hundred seventy-nine".