99999655 has 16 divisors (see below), whose sum is σ = 137700864. Its totient is φ = 68292000.

The previous prime is 99999643. The next prime is 99999677. The reversal of 99999655 is 55699999.

It is not a de Polignac number, because 99999655 - 2⁵ = 99999623 is a prime.

It is a nialpdrome in base 10.

It is a junction number, because it is equal to n+sod(n) for n = 99999593 and 99999602.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3094 + ... + 14476.

It is an arithmetic number, because the mean of its divisors is an integer number (8606304).

Almost surely, 2^99999655 is an apocalyptic number.

99999655 is a deficient number, since it is larger than the sum of its proper divisors (37701209).

99999655 is a wasteful number, since it uses less digits than its factorization.

99999655 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11646.

The product of its digits is 8857350, while the sum is 61.

The square root of 99999655 is about 9999.9827499851. The cubic root of 99999655 is about 464.1583495779.

The spelling of 99999655 in words is "ninety-nine million, nine hundred ninety-nine thousand, six hundred fifty-five".