99772868387 has 2 divisors, whose sum is σ = 99772868388. Its totient is φ = 99772868386.

The previous prime is 99772868323. The next prime is 99772868411. The reversal of 99772868387 is 78386827799.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 99772868387 - 2⁶ = 99772868323 is a prime.

It is not a weakly prime, because it can be changed into another prime (99772868687) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 49886434193 + 49886434194.

It is an arithmetic number, because the mean of its divisors is an integer number (49886434194).

Almost surely, 2^99772868387 is an apocalyptic number.

99772868387 is a deficient number, since it is larger than the sum of its proper divisors (1).

99772868387 is an equidigital number, since it uses as much as digits as its factorization.

99772868387 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 512096256, while the sum is 74.

The spelling of 99772868387 in words is "ninety-nine billion, seven hundred seventy-two million, eight hundred sixty-eight thousand, three hundred eighty-seven".