99951807 has 12 divisors (see below), whose sum is σ = 134695176. Its totient is φ = 65928960.

The previous prime is 99951779. The next prime is 99951811. The reversal of 99951807 is 70815999.

It is not a de Polignac number, because 99951807 - 2⁶ = 99951743 is a prime.

It is a Smith number, since the sum of its digits (48) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (99951877) 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 11 ways as a sum of consecutive naturals, for example, 26457 + ... + 29997.

It is an arithmetic number, because the mean of its divisors is an integer number (11224598).

Almost surely, 2^99951807 is an apocalyptic number.

99951807 is a gapful number since it is divisible by the number (97) formed by its first and last digit.

99951807 is a deficient number, since it is larger than the sum of its proper divisors (34743369).

99951807 is an equidigital number, since it uses as much as digits as its factorization.

99951807 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3738 (or 3641 counting only the distinct ones).

The product of its (nonzero) digits is 204120, while the sum is 48.

The square root of 99951807 is about 9997.5900596094. The cubic root of 99951807 is about 464.0843073496.

The spelling of 99951807 in words is "ninety-nine million, nine hundred fifty-one thousand, eight hundred seven".