99951878 has 8 divisors (see below), whose sum is σ = 161460768. Its totient is φ = 46131624.

The previous prime is 99951877. The next prime is 99951881. The reversal of 99951878 is 87815999.

It is a happy number.

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

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 (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1922126 + ... + 1922177.

It is an arithmetic number, because the mean of its divisors is an integer number (20182596).

Almost surely, 2^99951878 is an apocalyptic number.

99951878 is a deficient number, since it is larger than the sum of its proper divisors (61508890).

99951878 is a wasteful number, since it uses less digits than its factorization.

99951878 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3844318.

The product of its digits is 1632960, while the sum is 56.

The square root of 99951878 is about 9997.5936104645. The cubic root of 99951878 is about 464.0844172359.

The spelling of 99951878 in words is "ninety-nine million, nine hundred fifty-one thousand, eight hundred seventy-eight".