99801391 has 8 divisors (see below), whose sum is σ = 103011840. Its totient is φ = 96641688.

The previous prime is 99801389. The next prime is 99801419. The reversal of 99801391 is 19310899.

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 99801391 - 2¹ = 99801389 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 (99801311) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 8671 + ... + 16576.

It is an arithmetic number, because the mean of its divisors is an integer number (12876480).

Almost surely, 2^99801391 is an apocalyptic number.

99801391 is a deficient number, since it is larger than the sum of its proper divisors (3210449).

99801391 is a wasteful number, since it uses less digits than its factorization.

99801391 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25373.

The product of its (nonzero) digits is 17496, while the sum is 40.

The square root of 99801391 is about 9990.0646144057. The cubic root of 99801391 is about 463.8513925977.

The spelling of 99801391 in words is "ninety-nine million, eight hundred one thousand, three hundred ninety-one".