345321503 has 2 divisors, whose sum is σ = 345321504. Its totient is φ = 345321502.

The previous prime is 345321491. The next prime is 345321547. The reversal of 345321503 is 305123543.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 345321503 - 2¹² = 345317407 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (345324503) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 172660751 + 172660752.

It is an arithmetic number, because the mean of its divisors is an integer number (172660752).

Almost surely, 2^345321503 is an apocalyptic number.

345321503 is a deficient number, since it is larger than the sum of its proper divisors (1).

345321503 is an equidigital number, since it uses as much as digits as its factorization.

345321503 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 5400, while the sum is 26.

The square root of 345321503 is about 18582.8281754958. The cubic root of 345321503 is about 701.5757041607.

The spelling of 345321503 in words is "three hundred forty-five million, three hundred twenty-one thousand, five hundred three".