89840779 has 4 divisors (see below), whose sum is σ = 102675184. Its totient is φ = 77006376.

The previous prime is 89840771. The next prime is 89840791. The reversal of 89840779 is 97704898.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 97704898 = 2 ⋅48852449.

It is a cyclic number.

It is not a de Polignac number, because 89840779 - 2³ = 89840771 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (89840771) 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, 6417192 + ... + 6417205.

It is an arithmetic number, because the mean of its divisors is an integer number (25668796).

Almost surely, 2^89840779 is an apocalyptic number.

89840779 is a deficient number, since it is larger than the sum of its proper divisors (12834405).

89840779 is a wasteful number, since it uses less digits than its factorization.

89840779 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12834404.

The product of its (nonzero) digits is 1016064, while the sum is 52.

The square root of 89840779 is about 9478.4375822179. The cubic root of 89840779 is about 447.8760469019.

The spelling of 89840779 in words is "eighty-nine million, eight hundred forty thousand, seven hundred seventy-nine".