287223693121 has 2 divisors, whose sum is σ = 287223693122. Its totient is φ = 287223693120.

The previous prime is 287223692969. The next prime is 287223693191. The reversal of 287223693121 is 121396322782.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 273502850625 + 13720842496 = 522975^2 + 117136^2 .

It is a cyclic number.

It is not a de Polignac number, because 287223693121 - 2¹⁷ = 287223562049 is a prime.

It is not a weakly prime, because it can be changed into another prime (287223693191) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 143611846560 + 143611846561.

It is an arithmetic number, because the mean of its divisors is an integer number (143611846561).

Almost surely, 2^287223693121 is an apocalyptic number.

It is an amenable number.

287223693121 is a deficient number, since it is larger than the sum of its proper divisors (1).

287223693121 is an equidigital number, since it uses as much as digits as its factorization.

287223693121 is an evil number, because the sum of its binary digits is even.

The product of its digits is 435456, while the sum is 46.

The spelling of 287223693121 in words is "two hundred eighty-seven billion, two hundred twenty-three million, six hundred ninety-three thousand, one hundred twenty-one".