1977601 has 2 divisors, whose sum is σ = 1977602. Its totient is φ = 1977600.

The previous prime is 1977581. The next prime is 1977611. The reversal of 1977601 is 1067791.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1703025 + 274576 = 1305^2 + 524^2 .

It is a cyclic number.

It is not a de Polignac number, because 1977601 - 2⁹ = 1977089 is a prime.

It is not a weakly prime, because it can be changed into another prime (1977611) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 988800 + 988801.

It is an arithmetic number, because the mean of its divisors is an integer number (988801).

2^1977601 is an apocalyptic number.

It is an amenable number.

1977601 is a deficient number, since it is larger than the sum of its proper divisors (1).

1977601 is an equidigital number, since it uses as much as digits as its factorization.

1977601 is an odious number, because the sum of its binary digits is odd.

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

The square root of 1977601 is about 1406.2720220498. The cubic root of 1977601 is about 125.5199885624.

The spelling of 1977601 in words is "one million, nine hundred seventy-seven thousand, six hundred one".