989407385 has 4 divisors (see below), whose sum is σ = 1187288868. Its totient is φ = 791525904.

The previous prime is 989407379. The next prime is 989407409. The reversal of 989407385 is 583704989.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 583704989 = 7 ⋅83386427.

It can be written as a sum of positive squares in 2 ways, for example, as 746546329 + 242861056 = 27323^2 + 15584^2 .

It is a cyclic number.

It is not a de Polignac number, because 989407385 - 2²² = 985213081 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 98940734 + ... + 98940743.

It is an arithmetic number, because the mean of its divisors is an integer number (296822217).

Almost surely, 2^989407385 is an apocalyptic number.

It is an amenable number.

989407385 is a deficient number, since it is larger than the sum of its proper divisors (197881483).

989407385 is a wasteful number, since it uses less digits than its factorization.

989407385 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 197881482.

The product of its (nonzero) digits is 2177280, while the sum is 53.

The square root of 989407385 is about 31454.8467648469. The cubic root of 989407385 is about 996.4565873905.

The spelling of 989407385 in words is "nine hundred eighty-nine million, four hundred seven thousand, three hundred eighty-five".