99651271 has 2 divisors, whose sum is σ = 99651272. Its totient is φ = 99651270.

The previous prime is 99651241. The next prime is 99651283. The reversal of 99651271 is 17215699.

It is a strong prime.

It is an emirp because it is prime and its reverse (17215699) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 99651271 - 2¹⁵ = 99618503 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (99651241) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 49825635 + 49825636.

It is an arithmetic number, because the mean of its divisors is an integer number (49825636).

Almost surely, 2^99651271 is an apocalyptic number.

99651271 is a deficient number, since it is larger than the sum of its proper divisors (1).

99651271 is an equidigital number, since it uses as much as digits as its factorization.

99651271 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 34020, while the sum is 40.

The square root of 99651271 is about 9982.5483219467. The cubic root of 99651271 is about 463.6187027409.

It can be divided in two parts, 9965 and 1271, that added together give a square (11236 = 106²).

The spelling of 99651271 in words is "ninety-nine million, six hundred fifty-one thousand, two hundred seventy-one".