99993247 has 4 divisors (see below), whose sum is σ = 103441320. Its totient is φ = 96545176.

The previous prime is 99993211. The next prime is 99993253. The reversal of 99993247 is 74239999.

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

It is not a de Polignac number, because 99993247 - 2⁷ = 99993119 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 99993194 and 99993203.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (99993287) 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, 1723993 + ... + 1724050.

It is an arithmetic number, because the mean of its divisors is an integer number (25860330).

Almost surely, 2^99993247 is an apocalyptic number.

99993247 is a deficient number, since it is larger than the sum of its proper divisors (3448073).

99993247 is a wasteful number, since it uses less digits than its factorization.

99993247 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3448072.

The product of its digits is 1102248, while the sum is 52.

The square root of 99993247 is about 9999.6623442994. The cubic root of 99993247 is about 464.1484349096.

The spelling of 99993247 in words is "ninety-nine million, nine hundred ninety-three thousand, two hundred forty-seven".