2689406173 has 4 divisors (see below), whose sum is σ = 2689557120. Its totient is φ = 2689255228.

The previous prime is 2689406149. The next prime is 2689406179. The reversal of 2689406173 is 3716049862.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 2689406173 - 2⁵ = 2689406141 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 (2689406179) 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, 44515 + ... + 85792.

It is an arithmetic number, because the mean of its divisors is an integer number (672389280).

Almost surely, 2^2689406173 is an apocalyptic number.

It is an amenable number.

2689406173 is a deficient number, since it is larger than the sum of its proper divisors (150947).

2689406173 is a wasteful number, since it uses less digits than its factorization.

2689406173 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 150946.

The product of its (nonzero) digits is 435456, while the sum is 46.

The square root of 2689406173 is about 51859.4848894587. The cubic root of 2689406173 is about 1390.6530707883.

The spelling of 2689406173 in words is "two billion, six hundred eighty-nine million, four hundred six thousand, one hundred seventy-three".