99571247 has 8 divisors (see below), whose sum is σ = 102338880. Its totient is φ = 96819840.

The previous prime is 99571243. The next prime is 99571249. The reversal of 99571247 is 74217599.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 99571247 - 2² = 99571243 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 99571198 and 99571207.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (99571243) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 8954 + ... + 16712.

It is an arithmetic number, because the mean of its divisors is an integer number (12792360).

Almost surely, 2^99571247 is an apocalyptic number.

99571247 is a deficient number, since it is larger than the sum of its proper divisors (2767633).

99571247 is a wasteful number, since it uses less digits than its factorization.

99571247 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8113.

The product of its digits is 158760, while the sum is 44.

The square root of 99571247 is about 9978.5393219649. The cubic root of 99571247 is about 463.4945679850.

The spelling of 99571247 in words is "ninety-nine million, five hundred seventy-one thousand, two hundred forty-seven".