691144211341 has 2 divisors, whose sum is σ = 691144211342. Its totient is φ = 691144211340.

The previous prime is 691144211273. The next prime is 691144211369. The reversal of 691144211341 is 143112441196.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 661544729316 + 29599482025 = 813354^2 + 172045^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-691144211341 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 691144211341.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (691144211371) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 345572105670 + 345572105671.

It is an arithmetic number, because the mean of its divisors is an integer number (345572105671).

Almost surely, 2^691144211341 is an apocalyptic number.

It is an amenable number.

691144211341 is a deficient number, since it is larger than the sum of its proper divisors (1).

691144211341 is an equidigital number, since it uses as much as digits as its factorization.

691144211341 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 20736, while the sum is 37.

The spelling of 691144211341 in words is "six hundred ninety-one billion, one hundred forty-four million, two hundred eleven thousand, three hundred forty-one".