99948891 has 16 divisors (see below), whose sum is σ = 154886400. Its totient is φ = 56144928.

The previous prime is 99948889. The next prime is 99948917. The reversal of 99948891 is 19884999.

It is a happy number.

It is not a de Polignac number, because 99948891 - 2¹ = 99948889 is a prime.

It is not an unprimeable number, because it can be changed into a prime (99948811) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 39096 + ... + 41573.

It is an arithmetic number, because the mean of its divisors is an integer number (9680400).

Almost surely, 2^99948891 is an apocalyptic number.

99948891 is a deficient number, since it is larger than the sum of its proper divisors (54937509).

99948891 is a wasteful number, since it uses less digits than its factorization.

99948891 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 80738.

The product of its digits is 1679616, while the sum is 57.

The square root of 99948891 is about 9997.4442234003. Note that the first 3 decimals coincide. The cubic root of 99948891 is about 464.0797942313.

The spelling of 99948891 in words is "ninety-nine million, nine hundred forty-eight thousand, eight hundred ninety-one".