1620002431 has 2 divisors, whose sum is σ = 1620002432. Its totient is φ = 1620002430.

The previous prime is 1620002411. The next prime is 1620002441. The reversal of 1620002431 is 1342000261.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1620002431 - 2⁷ = 1620002303 is a prime.

It is a super-3 number, since 3×1620002431³ (a number of 29 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a junction number, because it is equal to n+sod(n) for n = 1620002399 and 1620002408.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1620002411) 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 as a sum of consecutive naturals, namely, 810001215 + 810001216.

It is an arithmetic number, because the mean of its divisors is an integer number (810001216).

Almost surely, 2^1620002431 is an apocalyptic number.

1620002431 is a deficient number, since it is larger than the sum of its proper divisors (1).

1620002431 is an equidigital number, since it uses as much as digits as its factorization.

1620002431 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 288, while the sum is 19.

The square root of 1620002431 is about 40249.2537943252. The cubic root of 1620002431 is about 1174.4608798222.

Adding to 1620002431 its reverse (1342000261), we get a palindrome (2962002692).

The spelling of 1620002431 in words is "one billion, six hundred twenty million, two thousand, four hundred thirty-one".