99991349 has 4 divisors (see below), whose sum is σ = 100017120. Its totient is φ = 99965580.

The previous prime is 99991343. The next prime is 99991363. The reversal of 99991349 is 94319999.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-99991349 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 99991349.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (99991343) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5747 + ... + 15264.

It is an arithmetic number, because the mean of its divisors is an integer number (25004280).

Almost surely, 2^99991349 is an apocalyptic number.

It is an amenable number.

99991349 is a deficient number, since it is larger than the sum of its proper divisors (25771).

99991349 is a wasteful number, since it uses less digits than its factorization.

99991349 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25770.

The product of its digits is 708588, while the sum is 53.

The square root of 99991349 is about 9999.5674406446. The cubic root of 99991349 is about 464.1454981803.

The spelling of 99991349 in words is "ninety-nine million, nine hundred ninety-one thousand, three hundred forty-nine".