99987782273 has 2 divisors, whose sum is σ = 99987782274. Its totient is φ = 99987782272.

The previous prime is 99987782239. The next prime is 99987782287. The reversal of 99987782273 is 37228778999.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 63187882384 + 36799899889 = 251372^2 + 191833^2 .

It is a cyclic number.

It is not a de Polignac number, because 99987782273 - 2¹⁶ = 99987716737 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 99987782197 and 99987782206.

It is not a weakly prime, because it can be changed into another prime (99987782173) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 49993891136 + 49993891137.

It is an arithmetic number, because the mean of its divisors is an integer number (49993891137).

Almost surely, 2^99987782273 is an apocalyptic number.

It is an amenable number.

99987782273 is a deficient number, since it is larger than the sum of its proper divisors (1).

99987782273 is an equidigital number, since it uses as much as digits as its factorization.

99987782273 is an evil number, because the sum of its binary digits is even.

The product of its digits is 192036096, while the sum is 71.

The spelling of 99987782273 in words is "ninety-nine billion, nine hundred eighty-seven million, seven hundred eighty-two thousand, two hundred seventy-three".