99996391 has 8 divisors (see below), whose sum is σ = 109200384. Its totient is φ = 90811320.

The previous prime is 99996389. The next prime is 99996409. The reversal of 99996391 is 19369999.

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 99996391 - 2¹ = 99996389 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 (99996191) 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, 7776 + ... + 16138.

It is an arithmetic number, because the mean of its divisors is an integer number (13650048).

Almost surely, 2^99996391 is an apocalyptic number.

99996391 is a deficient number, since it is larger than the sum of its proper divisors (9203993).

99996391 is a wasteful number, since it uses less digits than its factorization.

99996391 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9461.

The product of its digits is 1062882, while the sum is 55.

The square root of 99996391 is about 9999.8195483719. The cubic root of 99996391 is about 464.1532994627.

The spelling of 99996391 in words is "ninety-nine million, nine hundred ninety-six thousand, three hundred ninety-one".