99991034 has 32 divisors (see below), whose sum is σ = 185492160. Its totient is φ = 39744000.

The previous prime is 99991033. The next prime is 99991049. The reversal of 99991034 is 43019999.

It is not an unprimeable number, because it can be changed into a prime (99991033) 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, 3767 + ... + 14634.

It is an arithmetic number, because the mean of its divisors is an integer number (5796630).

Almost surely, 2^99991034 is an apocalyptic number.

99991034 is a deficient number, since it is larger than the sum of its proper divisors (85501126).

99991034 is a wasteful number, since it uses less digits than its factorization.

99991034 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18446.

The product of its (nonzero) digits is 78732, while the sum is 44.

The square root of 99991034 is about 9999.5516899509. The cubic root of 99991034 is about 464.1450107848.

The spelling of 99991034 in words is "ninety-nine million, nine hundred ninety-one thousand, thirty-four".