79775 has 6 divisors (see below), whose sum is σ = 98952. Its totient is φ = 63800.

The previous prime is 79769. The next prime is 79777. The reversal of 79775 is 57797.

It is not a de Polignac number, because 79775 - 2¹² = 75679 is a prime.

It is an Ulam number.

It is a Duffinian number.

It is a plaindrome in base 16.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (79777) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1571 + ... + 1620.

It is an arithmetic number, because the mean of its divisors is an integer number (16492).

2⁷⁹⁷⁷⁵ is an apocalyptic number.

79775 is a deficient number, since it is larger than the sum of its proper divisors (19177).

79775 is a wasteful number, since it uses less digits than its factorization.

79775 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3201 (or 3196 counting only the distinct ones).

The product of its digits is 15435, while the sum is 35.

The square root of 79775 is about 282.4446848500. Note that the first 3 decimals coincide. The cubic root of 79775 is about 43.0482602200.

The spelling of 79775 in words is "seventy-nine thousand, seven hundred seventy-five".