99540047 has 4 divisors (see below), whose sum is σ = 99568560. Its totient is φ = 99511536.

The previous prime is 99540037. The next prime is 99540059. The reversal of 99540047 is 74004599.

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

It is not a de Polignac number, because 99540047 - 2¹⁶ = 99474511 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 (99540017) 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, 8147 + ... + 16292.

It is an arithmetic number, because the mean of its divisors is an integer number (24892140).

Almost surely, 2^99540047 is an apocalyptic number.

99540047 is a deficient number, since it is larger than the sum of its proper divisors (28513).

99540047 is a wasteful number, since it uses less digits than its factorization.

99540047 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28512.

The product of its (nonzero) digits is 45360, while the sum is 38.

The square root of 99540047 is about 9976.9758444130. The cubic root of 99540047 is about 463.4461519290.

The spelling of 99540047 in words is "ninety-nine million, five hundred forty thousand, forty-seven".