99772571 has 2 divisors, whose sum is σ = 99772572. Its totient is φ = 99772570.

The previous prime is 99772567. The next prime is 99772573. The reversal of 99772571 is 17527799.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 99772571 - 2² = 99772567 is a prime.

Together with 99772573, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (99772573) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 49886285 + 49886286.

It is an arithmetic number, because the mean of its divisors is an integer number (49886286).

Almost surely, 2^99772571 is an apocalyptic number.

99772571 is a deficient number, since it is larger than the sum of its proper divisors (1).

99772571 is an equidigital number, since it uses as much as digits as its factorization.

99772571 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 277830, while the sum is 47.

The square root of 99772571 is about 9988.6220771436. The cubic root of 99772571 is about 463.8067389644.

The spelling of 99772571 in words is "ninety-nine million, seven hundred seventy-two thousand, five hundred seventy-one".