89729857 has 8 divisors (see below), whose sum is σ = 106084800. Its totient is φ = 74259024.

The previous prime is 89729821. The next prime is 89729867. The reversal of 89729857 is 75892798.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a de Polignac number, because none of the positive numbers 2^k-89729857 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 89729798 and 89729807.

It is not an unprimeable number, because it can be changed into a prime (89729867) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 220807 + ... + 221212.

It is an arithmetic number, because the mean of its divisors is an integer number (13260600).

Almost surely, 2^89729857 is an apocalyptic number.

It is an amenable number.

89729857 is a deficient number, since it is larger than the sum of its proper divisors (16354943).

89729857 is a wasteful number, since it uses less digits than its factorization.

89729857 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 442055.

The product of its digits is 2540160, while the sum is 55.

The square root of 89729857 is about 9472.5844942128. The cubic root of 89729857 is about 447.6916474677.

The spelling of 89729857 in words is "eighty-nine million, seven hundred twenty-nine thousand, eight hundred fifty-seven".