1620229943 has 8 divisors (see below), whose sum is σ = 1639621488. Its totient is φ = 1600953984.

The previous prime is 1620229937. The next prime is 1620229951. The reversal of 1620229943 is 3499220261.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1620229943 - 2¹⁴ = 1620213559 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1620229897 and 1620229906.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1620829943) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 530 + ... + 56927.

It is an arithmetic number, because the mean of its divisors is an integer number (204952686).

Almost surely, 2^1620229943 is an apocalyptic number.

1620229943 is a deficient number, since it is larger than the sum of its proper divisors (19391545).

1620229943 is a wasteful number, since it uses less digits than its factorization.

1620229943 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 57793.

The product of its (nonzero) digits is 46656, while the sum is 38.

The square root of 1620229943 is about 40252.0799835238. The cubic root of 1620229943 is about 1174.5158574014.

The spelling of 1620229943 in words is "one billion, six hundred twenty million, two hundred twenty-nine thousand, nine hundred forty-three".