99897722 has 4 divisors (see below), whose sum is σ = 149846586. Its totient is φ = 49948860.

The previous prime is 99897713. The next prime is 99897727. The reversal of 99897722 is 22779899.

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

It can be written as a sum of positive squares in only one way, i.e., 97792321 + 2105401 = 9889^2 + 1451^2 .

It is not an unprimeable number, because it can be changed into a prime (99897727) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 24974429 + ... + 24974432.

Almost surely, 2^99897722 is an apocalyptic number.

99897722 is a deficient number, since it is larger than the sum of its proper divisors (49948864).

99897722 is a wasteful number, since it uses less digits than its factorization.

99897722 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 49948863.

The product of its digits is 1143072, while the sum is 53.

The square root of 99897722 is about 9994.8847917322. The cubic root of 99897722 is about 464.0005852400. Note that the first 3 decimals are identical.

The spelling of 99897722 in words is "ninety-nine million, eight hundred ninety-seven thousand, seven hundred twenty-two".