989946407 has 4 divisors (see below), whose sum is σ = 1024082520. Its totient is φ = 955810296.

The previous prime is 989946389. The next prime is 989946409. The reversal of 989946407 is 704649989.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 704649989 = 397 ⋅1774937.

It is a cyclic number.

It is not a de Polignac number, because 989946407 - 2¹² = 989942311 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (989946409) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 17068013 + ... + 17068070.

It is an arithmetic number, because the mean of its divisors is an integer number (256020630).

Almost surely, 2^989946407 is an apocalyptic number.

989946407 is a deficient number, since it is larger than the sum of its proper divisors (34136113).

989946407 is a wasteful number, since it uses less digits than its factorization.

989946407 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 34136112.

The product of its (nonzero) digits is 3919104, while the sum is 56.

The square root of 989946407 is about 31463.4137849026. The cubic root of 989946407 is about 996.6375086578.

The spelling of 989946407 in words is "nine hundred eighty-nine million, nine hundred forty-six thousand, four hundred seven".