977609 has 2 divisors, whose sum is σ = 977610. Its totient is φ = 977608.

The previous prime is 977593. The next prime is 977611. The reversal of 977609 is 906779.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 727609 + 250000 = 853^2 + 500^2 .

It is an emirp because it is prime and its reverse (906779) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 977609 - 2⁴ = 977593 is a prime.

Together with 977611, it forms a pair of twin primes.

It is a Chen prime.

It is a plaindrome in base 15.

It is not a weakly prime, because it can be changed into another prime (977629) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 488804 + 488805.

It is an arithmetic number, because the mean of its divisors is an integer number (488805).

2⁹⁷⁷⁶⁰⁹ is an apocalyptic number.

It is an amenable number.

977609 is a deficient number, since it is larger than the sum of its proper divisors (1).

977609 is an equidigital number, since it uses as much as digits as its factorization.

977609 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 23814, while the sum is 38.

The square root of 977609 is about 988.7411187970. The cubic root of 977609 is about 99.2479923541.

The spelling of 977609 in words is "nine hundred seventy-seven thousand, six hundred nine".