99991345 has 8 divisors (see below), whose sum is σ = 121435776. Its totient is φ = 79028976.

The previous prime is 99991343. The next prime is 99991363. The reversal of 99991345 is 54319999.

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 99991345 - 2¹ = 99991343 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (99991343) 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, 120057 + ... + 120886.

It is an arithmetic number, because the mean of its divisors is an integer number (15179472).

Almost surely, 2^99991345 is an apocalyptic number.

It is an amenable number.

99991345 is a deficient number, since it is larger than the sum of its proper divisors (21444431).

99991345 is a wasteful number, since it uses less digits than its factorization.

99991345 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 241031.

The product of its digits is 393660, while the sum is 49.

The square root of 99991345 is about 9999.5672406360. The cubic root of 99991345 is about 464.1454919911.

The spelling of 99991345 in words is "ninety-nine million, nine hundred ninety-one thousand, three hundred forty-five".