89428657 has 4 divisors (see below), whose sum is σ = 89448436. Its totient is φ = 89408880.

The previous prime is 89428643. The next prime is 89428697. The reversal of 89428657 is 75682498.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 75682498 = 2 ⋅37841249.

It can be written as a sum of positive squares in 2 ways, for example, as 47554816 + 41873841 = 6896^2 + 6471^2 .

It is a cyclic number.

It is not a de Polignac number, because 89428657 - 2²³ = 81040049 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 89428657.

It is not an unprimeable number, because it can be changed into a prime (89428627) 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, 607 + ... + 13387.

It is an arithmetic number, because the mean of its divisors is an integer number (22362109).

Almost surely, 2^89428657 is an apocalyptic number.

It is an amenable number.

89428657 is a deficient number, since it is larger than the sum of its proper divisors (19779).

89428657 is a wasteful number, since it uses less digits than its factorization.

89428657 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19778.

The product of its digits is 967680, while the sum is 49.

The square root of 89428657 is about 9456.6726177869. The cubic root of 89428657 is about 447.1901574383.

The spelling of 89428657 in words is "eighty-nine million, four hundred twenty-eight thousand, six hundred fifty-seven".