99772868971 has 2 divisors, whose sum is σ = 99772868972. Its totient is φ = 99772868970.

The previous prime is 99772868957. The next prime is 99772869109. The reversal of 99772868971 is 17986827799.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 99772868971 - 2¹⁷ = 99772737899 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 99772868894 and 99772868903.

It is not a weakly prime, because it can be changed into another prime (99772862971) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 49886434485 + 49886434486.

It is an arithmetic number, because the mean of its divisors is an integer number (49886434486).

Almost surely, 2^99772868971 is an apocalyptic number.

99772868971 is a deficient number, since it is larger than the sum of its proper divisors (1).

99772868971 is an equidigital number, since it uses as much as digits as its factorization.

99772868971 is an evil number, because the sum of its binary digits is even.

The product of its digits is 192036096, while the sum is 73.

The spelling of 99772868971 in words is "ninety-nine billion, seven hundred seventy-two million, eight hundred sixty-eight thousand, nine hundred seventy-one".