611977 has 2 divisors, whose sum is σ = 611978. Its totient is φ = 611976.

The previous prime is 611969. The next prime is 611993. The reversal of 611977 is 779116.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 602176 + 9801 = 776^2 + 99^2 .

It is a cyclic number.

It is not a de Polignac number, because 611977 - 2³ = 611969 is a prime.

It is not a weakly prime, because it can be changed into another prime (611927) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 305988 + 305989.

It is an arithmetic number, because the mean of its divisors is an integer number (305989).

2⁶¹¹⁹⁷⁷ is an apocalyptic number.

It is an amenable number.

611977 is a deficient number, since it is larger than the sum of its proper divisors (1).

611977 is an equidigital number, since it uses as much as digits as its factorization.

611977 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 2646, while the sum is 31.

The square root of 611977 is about 782.2895883239. The cubic root of 611977 is about 84.9007838892.

The spelling of 611977 in words is "six hundred eleven thousand, nine hundred seventy-seven".