691047150289 has 2 divisors, whose sum is σ = 691047150290. Its totient is φ = 691047150288.

The previous prime is 691047150251. The next prime is 691047150301. The reversal of 691047150289 is 982051740196.

691047150289 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., 564459203025 + 126587947264 = 751305^2 + 355792^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-691047150289 is a prime.

It is not a weakly prime, because it can be changed into another prime (691047150089) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 345523575144 + 345523575145.

It is an arithmetic number, because the mean of its divisors is an integer number (345523575145).

Almost surely, 2^691047150289 is an apocalyptic number.

It is an amenable number.

691047150289 is a deficient number, since it is larger than the sum of its proper divisors (1).

691047150289 is an equidigital number, since it uses as much as digits as its factorization.

691047150289 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1088640, while the sum is 52.

The spelling of 691047150289 in words is "six hundred ninety-one billion, forty-seven million, one hundred fifty thousand, two hundred eighty-nine".