691842688367 has 2 divisors, whose sum is σ = 691842688368. Its totient is φ = 691842688366.

The previous prime is 691842688357. The next prime is 691842688403. The reversal of 691842688367 is 763886248196.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 691842688367 - 2³⁸ = 416964781423 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 691842688297 and 691842688306.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (691842688357) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 345921344183 + 345921344184.

It is an arithmetic number, because the mean of its divisors is an integer number (345921344184).

Almost surely, 2^691842688367 is an apocalyptic number.

691842688367 is a deficient number, since it is larger than the sum of its proper divisors (1).

691842688367 is an equidigital number, since it uses as much as digits as its factorization.

691842688367 is an evil number, because the sum of its binary digits is even.

The product of its digits is 167215104, while the sum is 68.

The spelling of 691842688367 in words is "six hundred ninety-one billion, eight hundred forty-two million, six hundred eighty-eight thousand, three hundred sixty-seven".