1620247433 has 8 divisors (see below), whose sum is σ = 1854427968. Its totient is φ = 1386746064.

The previous prime is 1620247303. The next prime is 1620247459. The reversal of 1620247433 is 3347420261.

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 1620247433 - 2²⁰ = 1619198857 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1620247433.

It is not an unprimeable number, because it can be changed into a prime (1620247493) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 164666 + ... + 174227.

It is an arithmetic number, because the mean of its divisors is an integer number (231803496).

Almost surely, 2^1620247433 is an apocalyptic number.

It is an amenable number.

1620247433 is a deficient number, since it is larger than the sum of its proper divisors (234180535).

1620247433 is an equidigital number, since it uses as much as digits as its factorization.

1620247433 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 339583.

The product of its (nonzero) digits is 24192, while the sum is 32.

The square root of 1620247433 is about 40252.2972387912. The cubic root of 1620247433 is about 1174.5200835934.

Adding to 1620247433 its reverse (3347420261), we get a palindrome (4967667694).

The spelling of 1620247433 in words is "one billion, six hundred twenty million, two hundred forty-seven thousand, four hundred thirty-three".