291672367489 has 2 divisors, whose sum is σ = 291672367490. Its totient is φ = 291672367488.

The previous prime is 291672367477. The next prime is 291672367531. The reversal of 291672367489 is 984763276192.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 178502025025 + 113170342464 = 422495^2 + 336408^2 .

It is a cyclic number.

It is not a de Polignac number, because 291672367489 - 2⁹ = 291672366977 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 291672367489.

It is not a weakly prime, because it can be changed into another prime (291672368489) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 145836183744 + 145836183745.

It is an arithmetic number, because the mean of its divisors is an integer number (145836183745).

Almost surely, 2^291672367489 is an apocalyptic number.

It is an amenable number.

291672367489 is a deficient number, since it is larger than the sum of its proper divisors (1).

291672367489 is an equidigital number, since it uses as much as digits as its factorization.

291672367489 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 54867456, while the sum is 64.

The spelling of 291672367489 in words is "two hundred ninety-one billion, six hundred seventy-two million, three hundred sixty-seven thousand, four hundred eighty-nine".