99991050 has 24 divisors (see below), whose sum is σ = 247978176. Its totient is φ = 26664240.

The previous prime is 99991049. The next prime is 99991063. The reversal of 99991050 is 5019999.

It is a junction number, because it is equal to n+sod(n) for n = 99990993 and 99991011.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 333154 + ... + 333453.

It is an arithmetic number, because the mean of its divisors is an integer number (10332424).

Almost surely, 2^99991050 is an apocalyptic number.

99991050 is an abundant number, since it is smaller than the sum of its proper divisors (147987126).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

99991050 is a wasteful number, since it uses less digits than its factorization.

99991050 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 666622 (or 666617 counting only the distinct ones).

The product of its (nonzero) digits is 32805, while the sum is 42.

The square root of 99991050 is about 9999.5524899867. The cubic root of 99991050 is about 464.1450355415.

The spelling of 99991050 in words is "ninety-nine million, nine hundred ninety-one thousand, fifty".