99965851 has 4 divisors (see below), whose sum is σ = 102092832. Its totient is φ = 97838872.

The previous prime is 99965849. The next prime is 99965857. The reversal of 99965851 is 15856999.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 99965851 - 2¹ = 99965849 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (99965857) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1063420 + ... + 1063513.

It is an arithmetic number, because the mean of its divisors is an integer number (25523208).

Almost surely, 2^99965851 is an apocalyptic number.

99965851 is a deficient number, since it is larger than the sum of its proper divisors (2126981).

99965851 is a wasteful number, since it uses less digits than its factorization.

99965851 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2126980.

The product of its digits is 874800, while the sum is 52.

The square root of 99965851 is about 9998.2924042058. The cubic root of 99965851 is about 464.1060421402.

The spelling of 99965851 in words is "ninety-nine million, nine hundred sixty-five thousand, eight hundred fifty-one".