77161 has 8 divisors (see below), whose sum is σ = 89984. Its totient is φ = 64800.

The previous prime is 77153. The next prime is 77167. The reversal of 77161 is 16177.

77161 is nontrivially palindromic in base 2.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a 4-Lehmer number, since φ(77161) divides (77161-1)⁴.

It is a cyclic number.

It is not a de Polignac number, because 77161 - 2³ = 77153 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (77167) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 436 + ... + 586.

It is an arithmetic number, because the mean of its divisors is an integer number (11248).

2⁷⁷¹⁶¹ is an apocalyptic number.

It is an amenable number.

77161 is a deficient number, since it is larger than the sum of its proper divisors (12823).

77161 is a wasteful number, since it uses less digits than its factorization.

77161 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 231.

The product of its digits is 294, while the sum is 22.

The square root of 77161 is about 277.7786888874. The cubic root of 77161 is about 42.5728393363.

Subtracting from 77161 its product of digits (294), we obtain a palindrome (76867).

The spelling of 77161 in words is "seventy-seven thousand, one hundred sixty-one".