1977903 has 6 divisors (see below), whose sum is σ = 2856984. Its totient is φ = 1318596.

The previous prime is 1977863. The next prime is 1977917. The reversal of 1977903 is 3097791.

It is a de Polignac number, because none of the positive numbers 2^k-1977903 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1977953) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 109875 + ... + 109892.

It is an arithmetic number, because the mean of its divisors is an integer number (476164).

2^1977903 is an apocalyptic number.

1977903 is a deficient number, since it is larger than the sum of its proper divisors (879081).

1977903 is a wasteful number, since it uses less digits than its factorization.

1977903 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 219773 (or 219770 counting only the distinct ones).

The product of its (nonzero) digits is 11907, while the sum is 36.

The square root of 1977903 is about 1406.3793940470. The cubic root of 1977903 is about 125.5263776347.

It can be divided in two parts, 197 and 7903, that added together give a square (8100 = 90²).

The spelling of 1977903 in words is "one million, nine hundred seventy-seven thousand, nine hundred three".