89123857 has 4 divisors (see below), whose sum is σ = 89616436. Its totient is φ = 88631280.

The previous prime is 89123849. The next prime is 89123863. The reversal of 89123857 is 75832198.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 21818241 + 67305616 = 4671^2 + 8204^2 .

It is a cyclic number.

It is not a de Polignac number, because 89123857 - 2³ = 89123849 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (89123887) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 246018 + ... + 246379.

It is an arithmetic number, because the mean of its divisors is an integer number (22404109).

Almost surely, 2^89123857 is an apocalyptic number.

It is an amenable number.

89123857 is a deficient number, since it is larger than the sum of its proper divisors (492579).

89123857 is a wasteful number, since it uses less digits than its factorization.

89123857 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 492578.

The product of its digits is 120960, while the sum is 43.

The square root of 89123857 is about 9440.5432576733. The cubic root of 89123857 is about 446.6815258912.

It can be divided in two parts, 8912 and 3857, that added together give a square (12769 = 113²).

The spelling of 89123857 in words is "eighty-nine million, one hundred twenty-three thousand, eight hundred fifty-seven".