97775 has 6 divisors (see below), whose sum is σ = 121272. Its totient is φ = 78200.

The previous prime is 97771. The next prime is 97777. The reversal of 97775 is 57779.

It is not a de Polignac number, because 97775 - 2² = 97771 is a prime.

It is a Duffinian number.

It is a plaindrome in base 14 and base 16.

It is a nialpdrome in base 10.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (97771) 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, 1931 + ... + 1980.

It is an arithmetic number, because the mean of its divisors is an integer number (20212).

2⁹⁷⁷⁷⁵ is an apocalyptic number.

97775 is a deficient number, since it is larger than the sum of its proper divisors (23497).

97775 is a wasteful number, since it uses less digits than its factorization.

97775 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3921 (or 3916 counting only the distinct ones).

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

The square root of 97775 is about 312.6899422751. The cubic root of 97775 is about 46.0690519319.

The spelling of 97775 in words is "ninety-seven thousand, seven hundred seventy-five".