977761 has 2 divisors, whose sum is σ = 977762. Its totient is φ = 977760.

The previous prime is 977747. The next prime is 977791. The reversal of 977761 is 167779.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 732736 + 245025 = 856^2 + 495^2 .

It is an emirp because it is prime and its reverse (167779) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 977761 - 2¹³ = 969569 is a prime.

It is a Chen prime.

It is a nialpdrome in base 10 and base 16.

It is a self number, because there is not a number n which added to its sum of digits gives 977761.

It is not a weakly prime, because it can be changed into another prime (977791) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 488880 + 488881.

It is an arithmetic number, because the mean of its divisors is an integer number (488881).

2⁹⁷⁷⁷⁶¹ is an apocalyptic number.

It is an amenable number.

977761 is a deficient number, since it is larger than the sum of its proper divisors (1).

977761 is an equidigital number, since it uses as much as digits as its factorization.

977761 is an evil number, because the sum of its binary digits is even.

The product of its digits is 18522, while the sum is 37.

The square root of 977761 is about 988.8179812281. The cubic root of 977761 is about 99.2531358259.

The spelling of 977761 in words is "nine hundred seventy-seven thousand, seven hundred sixty-one".