89623633621 has 2 divisors, whose sum is σ = 89623633622. Its totient is φ = 89623633620.

The previous prime is 89623633597. The next prime is 89623633643. The reversal of 89623633621 is 12633632698.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 80224331121 + 9399302500 = 283239^2 + 96950^2 .

It is a cyclic number.

It is not a de Polignac number, because 89623633621 - 2¹⁵ = 89623600853 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (89623643621) 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, 44811816810 + 44811816811.

It is an arithmetic number, because the mean of its divisors is an integer number (44811816811).

Almost surely, 2^89623633621 is an apocalyptic number.

It is an amenable number.

89623633621 is a deficient number, since it is larger than the sum of its proper divisors (1).

89623633621 is an equidigital number, since it uses as much as digits as its factorization.

89623633621 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1679616, while the sum is 49.

The spelling of 89623633621 in words is "eighty-nine billion, six hundred twenty-three million, six hundred thirty-three thousand, six hundred twenty-one".