2171678059 has 4 divisors (see below), whose sum is σ = 2192762416. Its totient is φ = 2150593704.

The previous prime is 2171678027. The next prime is 2171678081. The reversal of 2171678059 is 9508761712.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 2171678059 - 2⁵ = 2171678027 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2171673059) 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, 10542024 + ... + 10542229.

It is an arithmetic number, because the mean of its divisors is an integer number (548190604).

Almost surely, 2^2171678059 is an apocalyptic number.

2171678059 is a deficient number, since it is larger than the sum of its proper divisors (21084357).

2171678059 is a wasteful number, since it uses less digits than its factorization.

2171678059 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21084356.

The product of its (nonzero) digits is 211680, while the sum is 46.

The square root of 2171678059 is about 46601.2667102516. The cubic root of 2171678059 is about 1294.9862222810.

The spelling of 2171678059 in words is "two billion, one hundred seventy-one million, six hundred seventy-eight thousand, fifty-nine".