97777 has 2 divisors, whose sum is σ = 97778. Its totient is φ = 97776.

The previous prime is 97771. The next prime is 97787. The reversal of 97777 is 77779.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 73441 + 24336 = 271^2 + 156^2 .

It is a cyclic number.

It is not a de Polignac number, because 97777 - 2⁷ = 97649 is a prime.

It is a nialpdrome in base 10.

It is not a weakly prime, because it can be changed into another prime (97771) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 48888 + 48889.

It is an arithmetic number, because the mean of its divisors is an integer number (48889).

2⁹⁷⁷⁷⁷ is an apocalyptic number.

It is an amenable number.

97777 is a deficient number, since it is larger than the sum of its proper divisors (1).

97777 is an equidigital number, since it uses as much as digits as its factorization.

97777 is an evil number, because the sum of its binary digits is even.

The product of its digits is 21609, while the sum is 37.

The square root of 97777 is about 312.6931403149. The cubic root of 97777 is about 46.0693660458.

The spelling of 97777 in words is "ninety-seven thousand, seven hundred seventy-seven".