345841681 has 4 divisors (see below), whose sum is σ = 345960000. Its totient is φ = 345723364.

The previous prime is 345841649. The next prime is 345841721. The reversal of 345841681 is 186148543.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 186148543 = 7 ⋅26592649.

It is a cyclic number.

It is not a de Polignac number, because 345841681 - 2⁵ = 345841649 is a prime.

It is a super-2 number, since 2×345841681² = 239212936633811522, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (345821681) 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, 54661 + ... + 60658.

It is an arithmetic number, because the mean of its divisors is an integer number (86490000).

Almost surely, 2^345841681 is an apocalyptic number.

It is an amenable number.

345841681 is a deficient number, since it is larger than the sum of its proper divisors (118319).

345841681 is a wasteful number, since it uses less digits than its factorization.

345841681 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 118318.

The product of its digits is 92160, while the sum is 40.

The square root of 345841681 is about 18596.8191097295. The cubic root of 345841681 is about 701.9278022790.

The spelling of 345841681 in words is "three hundred forty-five million, eight hundred forty-one thousand, six hundred eighty-one".