99847391 has 8 divisors (see below), whose sum is σ = 114868224. Its totient is φ = 85015800.

The previous prime is 99847367. The next prime is 99847399. The reversal of 99847391 is 19374899.

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 99847391 - 2¹⁰ = 99846367 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 (99847399) 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, 46175 + ... + 48288.

It is an arithmetic number, because the mean of its divisors is an integer number (14358528).

Almost surely, 2^99847391 is an apocalyptic number.

99847391 is a deficient number, since it is larger than the sum of its proper divisors (15020833).

99847391 is a wasteful number, since it uses less digits than its factorization.

99847391 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 94621.

The product of its digits is 489888, while the sum is 50.

The square root of 99847391 is about 9992.3666365882. The cubic root of 99847391 is about 463.9226470711.

The spelling of 99847391 in words is "ninety-nine million, eight hundred forty-seven thousand, three hundred ninety-one".