99951806 has 48 divisors (see below), whose sum is σ = 169095600. Its totient is φ = 44233728.

The previous prime is 99951779. The next prime is 99951811. The reversal of 99951806 is 60815999.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1123010 + ... + 1123098.

It is an arithmetic number, because the mean of its divisors is an integer number (3522825).

Almost surely, 2^99951806 is an apocalyptic number.

99951806 is a deficient number, since it is larger than the sum of its proper divisors (69143794).

99951806 is a wasteful number, since it uses less digits than its factorization.

99951806 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 221 (or 204 counting only the distinct ones).

The product of its (nonzero) digits is 174960, while the sum is 47.

The square root of 99951806 is about 9997.5900095973. The cubic root of 99951806 is about 464.0843058019.

The spelling of 99951806 in words is "ninety-nine million, nine hundred fifty-one thousand, eight hundred six".