345103781 has 4 divisors (see below), whose sum is σ = 376476864. Its totient is φ = 313730700.

The previous prime is 345103771. The next prime is 345103789. The reversal of 345103781 is 187301543.

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.

It is a cyclic number.

It is not a de Polignac number, because 345103781 - 2²² = 340909477 is a prime.

It is a super-2 number, since 2×345103781² = 238193239320991922, which contains 22 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 (345103789) 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, 15686525 + ... + 15686546.

It is an arithmetic number, because the mean of its divisors is an integer number (94119216).

Almost surely, 2^345103781 is an apocalyptic number.

It is an amenable number.

345103781 is a deficient number, since it is larger than the sum of its proper divisors (31373083).

345103781 is a wasteful number, since it uses less digits than its factorization.

345103781 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 31373082.

The product of its (nonzero) digits is 10080, while the sum is 32.

The square root of 345103781 is about 18576.9691015515. The cubic root of 345103781 is about 701.4282275072.

The spelling of 345103781 in words is "three hundred forty-five million, one hundred three thousand, seven hundred eighty-one".