99605551 has 8 divisors (see below), whose sum is σ = 101170944. Its totient is φ = 98052120.

The previous prime is 99605537. The next prime is 99605579. The reversal of 99605551 is 15550699.

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 99605551 - 2⁷ = 99605423 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 (99605531) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 14586 + ... + 20296.

It is an arithmetic number, because the mean of its divisors is an integer number (12646368).

Almost surely, 2^99605551 is an apocalyptic number.

99605551 is a deficient number, since it is larger than the sum of its proper divisors (1565393).

99605551 is a wasteful number, since it uses less digits than its factorization.

99605551 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5981.

The product of its (nonzero) digits is 60750, while the sum is 40.

The square root of 99605551 is about 9980.2580627958. The cubic root of 99605551 is about 463.5477891460.

The spelling of 99605551 in words is "ninety-nine million, six hundred five thousand, five hundred fifty-one".