99906997 has 8 divisors (see below), whose sum is σ = 106607360. Its totient is φ = 93350880.

The previous prime is 99906979. The next prime is 99907051. The reversal of 99906997 is 79960999.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 99906997 - 2¹¹ = 99904949 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 (99906967) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 34629 + ... + 37402.

It is an arithmetic number, because the mean of its divisors is an integer number (13325920).

Almost surely, 2^99906997 is an apocalyptic number.

It is an amenable number.

99906997 is a deficient number, since it is larger than the sum of its proper divisors (6700363).

99906997 is a wasteful number, since it uses less digits than its factorization.

99906997 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 72123.

The product of its (nonzero) digits is 2480058, while the sum is 58.

The square root of 99906997 is about 9995.3487683022. The cubic root of 99906997 is about 464.0149448342.

The spelling of 99906997 in words is "ninety-nine million, nine hundred six thousand, nine hundred ninety-seven".