99812263 has 4 divisors (see below), whose sum is σ = 105065560. Its totient is φ = 94558968.

The previous prime is 99812239. The next prime is 99812267. The reversal of 99812263 is 36221899.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 99812263 - 2¹⁷ = 99681191 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (99812267) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2626620 + ... + 2626657.

It is an arithmetic number, because the mean of its divisors is an integer number (26266390).

Almost surely, 2^99812263 is an apocalyptic number.

99812263 is a deficient number, since it is larger than the sum of its proper divisors (5253297).

99812263 is a wasteful number, since it uses less digits than its factorization.

99812263 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5253296.

The product of its digits is 46656, while the sum is 40.

The square root of 99812263 is about 9990.6087402120. The cubic root of 99812263 is about 463.8682354131.

The spelling of 99812263 in words is "ninety-nine million, eight hundred twelve thousand, two hundred sixty-three".