890453583661 has 2 divisors, whose sum is σ = 890453583662. Its totient is φ = 890453583660.

The previous prime is 890453583659. The next prime is 890453583671. The reversal of 890453583661 is 166385354098.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 529793281161 + 360660302500 = 727869^2 + 600550^2 .

It is a cyclic number.

It is not a de Polignac number, because 890453583661 - 2¹ = 890453583659 is a prime.

Together with 890453583659, it forms a pair of twin primes.

It is a junction number, because it is equal to n+sod(n) for n = 890453583596 and 890453583605.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (890453583631) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 445226791830 + 445226791831.

It is an arithmetic number, because the mean of its divisors is an integer number (445226791831).

Almost surely, 2^890453583661 is an apocalyptic number.

It is an amenable number.

890453583661 is a deficient number, since it is larger than the sum of its proper divisors (1).

890453583661 is an equidigital number, since it uses as much as digits as its factorization.

890453583661 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 18662400, while the sum is 58.

The spelling of 890453583661 in words is "eight hundred ninety billion, four hundred fifty-three million, five hundred eighty-three thousand, six hundred sixty-one".