345729247 has 4 divisors (see below), whose sum is σ = 346142160. Its totient is φ = 345316336.

The previous prime is 345729233. The next prime is 345729269. The reversal of 345729247 is 742927543.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-345729247 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 (345729217) 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 3 ways as a sum of consecutive naturals, for example, 205198 + ... + 206875.

It is an arithmetic number, because the mean of its divisors is an integer number (86535540).

Almost surely, 2^345729247 is an apocalyptic number.

345729247 is a deficient number, since it is larger than the sum of its proper divisors (412913).

345729247 is an equidigital number, since it uses as much as digits as its factorization.

345729247 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 412912.

The product of its digits is 423360, while the sum is 43.

The square root of 345729247 is about 18593.7959276744. The cubic root of 345729247 is about 701.8517278699.

The spelling of 345729247 in words is "three hundred forty-five million, seven hundred twenty-nine thousand, two hundred forty-seven".