89890643 has 2 divisors, whose sum is σ = 89890644. Its totient is φ = 89890642.

The previous prime is 89890639. The next prime is 89890651. The reversal of 89890643 is 34609898.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 89890643 - 2² = 89890639 is a prime.

It is not a weakly prime, because it can be changed into another prime (89890613) 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, 44945321 + 44945322.

It is an arithmetic number, because the mean of its divisors is an integer number (44945322).

Almost surely, 2^89890643 is an apocalyptic number.

89890643 is a deficient number, since it is larger than the sum of its proper divisors (1).

89890643 is an equidigital number, since it uses as much as digits as its factorization.

89890643 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 373248, while the sum is 47.

The square root of 89890643 is about 9481.0676086610. The cubic root of 89890643 is about 447.9588925797.

The spelling of 89890643 in words is "eighty-nine million, eight hundred ninety thousand, six hundred forty-three".