291863484469 has 2 divisors, whose sum is σ = 291863484470. Its totient is φ = 291863484468.

The previous prime is 291863484467. The next prime is 291863484481. The reversal of 291863484469 is 964484368192.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 160212070225 + 131651414244 = 400265^2 + 362838^2 .

It is a cyclic number.

It is not a de Polignac number, because 291863484469 - 2¹ = 291863484467 is a prime.

It is a super-2 number, since 2×291863484469² (a number of 24 digits) contains 22 as substring.

Together with 291863484467, it forms a pair of twin primes.

It is a self number, because there is not a number n which added to its sum of digits gives 291863484469.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (291863484463) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 145931742234 + 145931742235.

It is an arithmetic number, because the mean of its divisors is an integer number (145931742235).

Almost surely, 2^291863484469 is an apocalyptic number.

It is an amenable number.

291863484469 is a deficient number, since it is larger than the sum of its proper divisors (1).

291863484469 is an equidigital number, since it uses as much as digits as its factorization.

291863484469 is an evil number, because the sum of its binary digits is even.

The product of its digits is 71663616, while the sum is 64.

The spelling of 291863484469 in words is "two hundred ninety-one billion, eight hundred sixty-three million, four hundred eighty-four thousand, four hundred sixty-nine".