691088341 has 2 divisors, whose sum is σ = 691088342. Its totient is φ = 691088340.

The previous prime is 691088263. The next prime is 691088353. The reversal of 691088341 is 143880196.

691088341 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 can be written as a sum of positive squares in only one way, i.e., 509404900 + 181683441 = 22570^2 + 13479^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-691088341 is a prime.

It is a super-2 number, since 2×691088341² = 955206190132264562, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 691088294 and 691088303.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (691088371) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 345544170 + 345544171.

It is an arithmetic number, because the mean of its divisors is an integer number (345544171).

Almost surely, 2^691088341 is an apocalyptic number.

It is an amenable number.

691088341 is a deficient number, since it is larger than the sum of its proper divisors (1).

691088341 is an equidigital number, since it uses as much as digits as its factorization.

691088341 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 41472, while the sum is 40.

The square root of 691088341 is about 26288.5591274988. The cubic root of 691088341 is about 884.1199465457.

The spelling of 691088341 in words is "six hundred ninety-one million, eighty-eight thousand, three hundred forty-one".