89729897 has 2 divisors, whose sum is σ = 89729898. Its totient is φ = 89729896.

The previous prime is 89729873. The next prime is 89729911. The reversal of 89729897 is 79892798.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 69488896 + 20241001 = 8336^2 + 4499^2 .

It is a cyclic number.

It is not a de Polignac number, because 89729897 - 2⁸ = 89729641 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (89729867) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 44864948 + 44864949.

It is an arithmetic number, because the mean of its divisors is an integer number (44864949).

Almost surely, 2^89729897 is an apocalyptic number.

It is an amenable number.

89729897 is a deficient number, since it is larger than the sum of its proper divisors (1).

89729897 is an equidigital number, since it uses as much as digits as its factorization.

89729897 is an evil number, because the sum of its binary digits is even.

The product of its digits is 4572288, while the sum is 59.

The square root of 89729897 is about 9472.5866055687. The cubic root of 89729897 is about 447.6917139921.

The spelling of 89729897 in words is "eighty-nine million, seven hundred twenty-nine thousand, eight hundred ninety-seven".