99995971 has 4 divisors (see below), whose sum is σ = 100213344. Its totient is φ = 99778600.

The previous prime is 99995957. The next prime is 99995983. The reversal of 99995971 is 17959999.

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 99995971 - 2⁵ = 99995939 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (99995171) 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, 107995 + ... + 108916.

It is an arithmetic number, because the mean of its divisors is an integer number (25053336).

Almost surely, 2^99995971 is an apocalyptic number.

99995971 is a deficient number, since it is larger than the sum of its proper divisors (217373).

99995971 is a wasteful number, since it uses less digits than its factorization.

99995971 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 217372.

The product of its digits is 2066715, while the sum is 58.

The square root of 99995971 is about 9999.7985479709. The cubic root of 99995971 is about 464.1526496238.

The spelling of 99995971 in words is "ninety-nine million, nine hundred ninety-five thousand, nine hundred seventy-one".