345357247 has 4 divisors (see below), whose sum is σ = 345473856. Its totient is φ = 345240640.

The previous prime is 345357217. The next prime is 345357289. The reversal of 345357247 is 742753543.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 742753543 = 7 ⋅106107649.

It is a cyclic number.

It is not a de Polignac number, because 345357247 - 2¹⁵ = 345324479 is a prime.

It is a super-3 number, since 3×345357247³ (a number of 27 digits) contains 333 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (345357217) 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, 53743 + ... + 59824.

It is an arithmetic number, because the mean of its divisors is an integer number (86368464).

Almost surely, 2^345357247 is an apocalyptic number.

345357247 is a deficient number, since it is larger than the sum of its proper divisors (116609).

345357247 is a wasteful number, since it uses less digits than its factorization.

345357247 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 116608.

The product of its digits is 352800, while the sum is 40.

The square root of 345357247 is about 18583.7898987263. The cubic root of 345357247 is about 701.5999098710.

The spelling of 345357247 in words is "three hundred forty-five million, three hundred fifty-seven thousand, two hundred forty-seven".