345853891 has 4 divisors (see below), whose sum is σ = 347364400. Its totient is φ = 344343384.

The previous prime is 345853847. The next prime is 345853909. The reversal of 345853891 is 198358543.

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

It is a cyclic number.

It is not a de Polignac number, because 345853891 - 2¹³ = 345845699 is a prime.

It is a super-2 number, since 2×345853891² = 239229827839679762, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (345853801) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 754911 + ... + 755368.

It is an arithmetic number, because the mean of its divisors is an integer number (86841100).

Almost surely, 2^345853891 is an apocalyptic number.

345853891 is a deficient number, since it is larger than the sum of its proper divisors (1510509).

345853891 is a wasteful number, since it uses less digits than its factorization.

345853891 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1510508.

The product of its digits is 518400, while the sum is 46.

The square root of 345853891 is about 18597.1473887798. The cubic root of 345853891 is about 701.9360627423.

The spelling of 345853891 in words is "three hundred forty-five million, eight hundred fifty-three thousand, eight hundred ninety-one".