641161699 has 2 divisors, whose sum is σ = 641161700. Its totient is φ = 641161698.

The previous prime is 641161657. The next prime is 641161721. The reversal of 641161699 is 996161146.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 641161699 - 2¹³ = 641153507 is a prime.

It is a super-2 number, since 2×641161699² = 822176648529133202, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (641161799) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 320580849 + 320580850.

It is an arithmetic number, because the mean of its divisors is an integer number (320580850).

Almost surely, 2^641161699 is an apocalyptic number.

641161699 is a deficient number, since it is larger than the sum of its proper divisors (1).

641161699 is an equidigital number, since it uses as much as digits as its factorization.

641161699 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 69984, while the sum is 43.

The square root of 641161699 is about 25321.1709642347. The cubic root of 641161699 is about 862.2949784762.

The spelling of 641161699 in words is "six hundred forty-one million, one hundred sixty-one thousand, six hundred ninety-nine".