99999071 has 4 divisors (see below), whose sum is σ = 105262200. Its totient is φ = 94735944.

The previous prime is 99999043. The next prime is 99999073. The reversal of 99999071 is 17099999.

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 99999071 - 2²² = 95804767 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (99999073) 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, 2631536 + ... + 2631573.

It is an arithmetic number, because the mean of its divisors is an integer number (26315550).

Almost surely, 2^99999071 is an apocalyptic number.

99999071 is a deficient number, since it is larger than the sum of its proper divisors (5263129).

99999071 is a wasteful number, since it uses less digits than its factorization.

99999071 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5263128.

The product of its (nonzero) digits is 413343, while the sum is 53.

The square root of 99999071 is about 9999.9535498921. The cubic root of 99999071 is about 464.1574460115.

The spelling of 99999071 in words is "ninety-nine million, nine hundred ninety-nine thousand, seventy-one".