99671535 has 72 divisors (see below), whose sum is σ = 186338880. Its totient is φ = 49256064.

The previous prime is 99671531. The next prime is 99671567. The reversal of 99671535 is 53517699.

It is not a de Polignac number, because 99671535 - 2² = 99671531 is a prime.

It is a Smith number, since the sum of its digits (45) coincides with the sum of the digits of its prime factors.

It is a Harshad number since it is a multiple of its sum of digits (45).

Its product of digits (255150) is a multiple of the sum of its prime factors (189).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (99671531) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 1261626 + ... + 1261704.

It is an arithmetic number, because the mean of its divisors is an integer number (2588040).

Almost surely, 2^99671535 is an apocalyptic number.

99671535 is a deficient number, since it is larger than the sum of its proper divisors (86667345).

99671535 is a wasteful number, since it uses less digits than its factorization.

99671535 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 189 (or 163 counting only the distinct ones).

The product of its digits is 255150, while the sum is 45.

The square root of 99671535 is about 9983.5632416487. The cubic root of 99671535 is about 463.6501260988.

The spelling of 99671535 in words is "ninety-nine million, six hundred seventy-one thousand, five hundred thirty-five".