345140623 has 4 divisors (see below), whose sum is σ = 350798728. Its totient is φ = 339482520.

The previous prime is 345140603. The next prime is 345140633. The reversal of 345140623 is 326041543.

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 345140623 - 2²¹ = 343043471 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 345140591 and 345140600.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (345140603) 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, 2828961 + ... + 2829082.

It is an arithmetic number, because the mean of its divisors is an integer number (87699682).

Almost surely, 2^345140623 is an apocalyptic number.

345140623 is a deficient number, since it is larger than the sum of its proper divisors (5658105).

345140623 is an equidigital number, since it uses as much as digits as its factorization.

345140623 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5658104.

The product of its (nonzero) digits is 8640, while the sum is 28.

The square root of 345140623 is about 18577.9606792565. The cubic root of 345140623 is about 701.4531872446.

The spelling of 345140623 in words is "three hundred forty-five million, one hundred forty thousand, six hundred twenty-three".