869489407 has 4 divisors (see below), whose sum is σ = 869548680. Its totient is φ = 869430136.

The previous prime is 869489377. The next prime is 869489417. The reversal of 869489407 is 704984968.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-869489407 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 (869489417) 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, 10368 + ... + 42970.

It is an arithmetic number, because the mean of its divisors is an integer number (217387170).

Almost surely, 2^869489407 is an apocalyptic number.

869489407 is a deficient number, since it is larger than the sum of its proper divisors (59273).

869489407 is a wasteful number, since it uses less digits than its factorization.

869489407 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 59272.

The product of its (nonzero) digits is 3483648, while the sum is 55.

The square root of 869489407 is about 29487.1057752367. The cubic root of 869489407 is about 954.4534785884.

The spelling of 869489407 in words is "eight hundred sixty-nine million, four hundred eighty-nine thousand, four hundred seven".