89896432421 has 2 divisors, whose sum is σ = 89896432422. Its totient is φ = 89896432420.

The previous prime is 89896432393. The next prime is 89896432447. The reversal of 89896432421 is 12423469898.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 59055804196 + 30840628225 = 243014^2 + 175615^2 .

It is a cyclic number.

It is not a de Polignac number, because 89896432421 - 2⁶ = 89896432357 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (89896432481) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 44948216210 + 44948216211.

It is an arithmetic number, because the mean of its divisors is an integer number (44948216211).

Almost surely, 2^89896432421 is an apocalyptic number.

It is an amenable number.

89896432421 is a deficient number, since it is larger than the sum of its proper divisors (1).

89896432421 is an equidigital number, since it uses as much as digits as its factorization.

89896432421 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 5971968, while the sum is 56.

The spelling of 89896432421 in words is "eighty-nine billion, eight hundred ninety-six million, four hundred thirty-two thousand, four hundred twenty-one".