1973898 has 12 divisors (see below), whose sum is σ = 4276818. Its totient is φ = 657960.

The previous prime is 1973897. The next prime is 1973903. The reversal of 1973898 is 8983791.

It can be written as a sum of positive squares in only one way, i.e., 1046529 + 927369 = 1023^2 + 963^2 .

It is not an unprimeable number, because it can be changed into a prime (1973893) 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 in 5 ways as a sum of consecutive naturals, for example, 54813 + ... + 54848.

2^1973898 is an apocalyptic number.

1973898 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

1973898 is an abundant number, since it is smaller than the sum of its proper divisors (2302920).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1973898 is a wasteful number, since it uses less digits than its factorization.

1973898 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 109669 (or 109666 counting only the distinct ones).

The product of its digits is 108864, while the sum is 45.

The square root of 1973898 is about 1404.9548035435. The cubic root of 1973898 is about 125.4415954439.

It can be divided in two parts, 197 and 3898, that added together give a triangular number (4095 = T₉₀).

The spelling of 1973898 in words is "one million, nine hundred seventy-three thousand, eight hundred ninety-eight".