99971822 has 8 divisors (see below), whose sum is σ = 150222072. Its totient is φ = 49897800.

The previous prime is 99971813. The next prime is 99971827. The reversal of 99971822 is 22817999.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (99971827) 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, 42629 + ... + 44912.

It is an arithmetic number, because the mean of its divisors is an integer number (18777759).

Almost surely, 2^99971822 is an apocalyptic number.

99971822 is a deficient number, since it is larger than the sum of its proper divisors (50250250).

99971822 is a wasteful number, since it uses less digits than its factorization.

99971822 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 88114.

The product of its digits is 163296, while the sum is 47.

The square root of 99971822 is about 9998.5910007361. The cubic root of 99971822 is about 464.1152823690.

The spelling of 99971822 in words is "ninety-nine million, nine hundred seventy-one thousand, eight hundred twenty-two".