89890789 has 2 divisors, whose sum is σ = 89890790. Its totient is φ = 89890788.

The previous prime is 89890771. The next prime is 89890799. The reversal of 89890789 is 98709898.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 89302500 + 588289 = 9450^2 + 767^2 .

It is a cyclic number.

It is not a de Polignac number, because 89890789 - 2⁹ = 89890277 is a prime.

It is a Chen prime.

It is an alternating number because its digits alternate between even and odd.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (89890799) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 44945394 + 44945395.

It is an arithmetic number, because the mean of its divisors is an integer number (44945395).

Almost surely, 2^89890789 is an apocalyptic number.

It is an amenable number.

89890789 is a deficient number, since it is larger than the sum of its proper divisors (1).

89890789 is an equidigital number, since it uses as much as digits as its factorization.

89890789 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2612736, while the sum is 58.

The square root of 89890789 is about 9481.0753082127. The cubic root of 89890789 is about 447.9591351039.

The spelling of 89890789 in words is "eighty-nine million, eight hundred ninety thousand, seven hundred eighty-nine".