1977953 has 2 divisors, whose sum is σ = 1977954. Its totient is φ = 1977952.

The previous prime is 1977929. The next prime is 1977961. The reversal of 1977953 is 3597791.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1763584 + 214369 = 1328^2 + 463^2 .

It is a cyclic number.

It is not a de Polignac number, because 1977953 - 2⁸ = 1977697 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1977953.

It is not a weakly prime, because it can be changed into another prime (1937953) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 988976 + 988977.

It is an arithmetic number, because the mean of its divisors is an integer number (988977).

2^1977953 is an apocalyptic number.

It is an amenable number.

1977953 is a deficient number, since it is larger than the sum of its proper divisors (1).

1977953 is an equidigital number, since it uses as much as digits as its factorization.

1977953 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 59535, while the sum is 41.

The square root of 1977953 is about 1406.3971700768. The cubic root of 1977953 is about 125.5274353653.

The spelling of 1977953 in words is "one million, nine hundred seventy-seven thousand, nine hundred fifty-three".