99991035 has 12 divisors (see below), whose sum is σ = 173317872. Its totient is φ = 53328528.

The previous prime is 99991033. The next prime is 99991049. The reversal of 99991035 is 53019999.

It is not a de Polignac number, because 99991035 - 2¹ = 99991033 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (45), and also a Moran number because the ratio is a prime number: 2222023 = 99991035 / (9 + 9 + 9 + 9 + 1 + 0 + 3 + 5).

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 11 ways as a sum of consecutive naturals, for example, 1110967 + ... + 1111056.

It is an arithmetic number, because the mean of its divisors is an integer number (14443156).

Almost surely, 2^99991035 is an apocalyptic number.

99991035 is a deficient number, since it is larger than the sum of its proper divisors (73326837).

99991035 is a wasteful number, since it uses less digits than its factorization.

99991035 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2222034 (or 2222031 counting only the distinct ones).

The product of its (nonzero) digits is 98415, while the sum is 45.

The square root of 99991035 is about 9999.5517399531. The cubic root of 99991035 is about 464.1450123321.

The spelling of 99991035 in words is "ninety-nine million, nine hundred ninety-one thousand, thirty-five".