1620306343 has 2 divisors, whose sum is σ = 1620306344. Its totient is φ = 1620306342.

The previous prime is 1620306307. The next prime is 1620306367. The reversal of 1620306343 is 3436030261.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1620306343 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1620303343) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 810153171 + 810153172.

It is an arithmetic number, because the mean of its divisors is an integer number (810153172).

Almost surely, 2^1620306343 is an apocalyptic number.

1620306343 is a deficient number, since it is larger than the sum of its proper divisors (1).

1620306343 is an equidigital number, since it uses as much as digits as its factorization.

1620306343 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 7776, while the sum is 28.

The square root of 1620306343 is about 40253.0289916175. The cubic root of 1620306343 is about 1174.5343180735.

The spelling of 1620306343 in words is "one billion, six hundred twenty million, three hundred six thousand, three hundred forty-three".