1623543231001 has 2 divisors, whose sum is σ = 1623543231002. Its totient is φ = 1623543231000.

The previous prime is 1623543230999. The next prime is 1623543231127. The reversal of 1623543231001 is 1001323453261.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1600354032601 + 23189198400 = 1265051^2 + 152280^2 .

It is an emirp because it is prime and its reverse (1001323453261) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1623543231001 - 2¹ = 1623543230999 is a prime.

Together with 1623543230999, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (1623543235001) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 811771615500 + 811771615501.

It is an arithmetic number, because the mean of its divisors is an integer number (811771615501).

Almost surely, 2^{1623543231001} is an apocalyptic number.

It is an amenable number.

1623543231001 is a deficient number, since it is larger than the sum of its proper divisors (1).

1623543231001 is an equidigital number, since it uses as much as digits as its factorization.

1623543231001 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 12960, while the sum is 31.

Adding to 1623543231001 its reverse (1001323453261), we get a palindrome (2624866684262).

The spelling of 1623543231001 in words is "one trillion, six hundred twenty-three billion, five hundred forty-three million, two hundred thirty-one thousand, one".