345721099 has 8 divisors (see below), whose sum is σ = 352005248. Its totient is φ = 339456960.

The previous prime is 345721097. The next prime is 345721109. The reversal of 345721099 is 990127543.

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 345721099 - 2¹ = 345721097 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (345721097) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 32359 + ... + 41695.

It is an arithmetic number, because the mean of its divisors is an integer number (44000656).

Almost surely, 2^345721099 is an apocalyptic number.

345721099 is a deficient number, since it is larger than the sum of its proper divisors (6284149).

345721099 is an equidigital number, since it uses as much as digits as its factorization.

345721099 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10005.

The product of its (nonzero) digits is 68040, while the sum is 40.

The square root of 345721099 is about 18593.5768210423. The cubic root of 345721099 is about 701.8462141788.

The spelling of 345721099 in words is "three hundred forty-five million, seven hundred twenty-one thousand, ninety-nine".