1973509223 has 4 divisors (see below), whose sum is σ = 2255439120. Its totient is φ = 1691579328.

The previous prime is 1973509207. The next prime is 1973509253. The reversal of 1973509223 is 3229053791.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 1973509223 - 2⁴ = 1973509207 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1973509253) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 140964938 + ... + 140964951.

It is an arithmetic number, because the mean of its divisors is an integer number (563859780).

Almost surely, 2^1973509223 is an apocalyptic number.

1973509223 is a deficient number, since it is larger than the sum of its proper divisors (281929897).

1973509223 is an equidigital number, since it uses as much as digits as its factorization.

1973509223 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 281929896.

The product of its (nonzero) digits is 102060, while the sum is 41.

The square root of 1973509223 is about 44424.1963686458. The cubic root of 1973509223 is about 1254.3335928562. Note that the first 3 decimals are identical.

The spelling of 1973509223 in words is "one billion, nine hundred seventy-three million, five hundred nine thousand, two hundred twenty-three".