345421513 has 2 divisors, whose sum is σ = 345421514. Its totient is φ = 345421512.

The previous prime is 345421507. The next prime is 345421541. The reversal of 345421513 is 315124543.

It is an a-pointer prime, because the next prime (345421541) can be obtained adding 345421513 to its sum of digits (28).

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 287539849 + 57881664 = 16957^2 + 7608^2 .

It is an emirp because it is prime and its reverse (315124543) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 345421513 - 2¹⁷ = 345290441 is a prime.

It is not a weakly prime, because it can be changed into another prime (345421553) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 172710756 + 172710757.

It is an arithmetic number, because the mean of its divisors is an integer number (172710757).

Almost surely, 2^345421513 is an apocalyptic number.

It is an amenable number.

345421513 is a deficient number, since it is larger than the sum of its proper divisors (1).

345421513 is an equidigital number, since it uses as much as digits as its factorization.

345421513 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 7200, while the sum is 28.

The square root of 345421513 is about 18585.5189058579. The cubic root of 345421513 is about 701.6434263781.

The spelling of 345421513 in words is "three hundred forty-five million, four hundred twenty-one thousand, five hundred thirteen".