687222299 has 2 divisors, whose sum is σ = 687222300. Its totient is φ = 687222298.

The previous prime is 687222257. The next prime is 687222307. The reversal of 687222299 is 992222786.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 687222299 - 2²⁰ = 686173723 is a prime.

It is not a weakly prime, because it can be changed into another prime (687222209) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 343611149 + 343611150.

It is an arithmetic number, because the mean of its divisors is an integer number (343611150).

Almost surely, 2^687222299 is an apocalyptic number.

687222299 is a deficient number, since it is larger than the sum of its proper divisors (1).

687222299 is an equidigital number, since it uses as much as digits as its factorization.

687222299 is an evil number, because the sum of its binary digits is even.

The product of its digits is 435456, while the sum is 47.

The square root of 687222299 is about 26214.9251190996. The cubic root of 687222299 is about 882.4682337353.

The spelling of 687222299 in words is "six hundred eighty-seven million, two hundred twenty-two thousand, two hundred ninety-nine".