1990594373 has 4 divisors (see below), whose sum is σ = 1993092780. Its totient is φ = 1988095968.

The previous prime is 1990594369. The next prime is 1990594393. The reversal of 1990594373 is 3734950991.

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

It can be written as a sum of positive squares in 2 ways, for example, as 1427101729 + 563492644 = 37777^2 + 23738^2 .

It is a cyclic number.

It is not a de Polignac number, because 1990594373 - 2² = 1990594369 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1990594303) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1248008 + ... + 1249601.

It is an arithmetic number, because the mean of its divisors is an integer number (498273195).

Almost surely, 2^1990594373 is an apocalyptic number.

It is an amenable number.

1990594373 is a deficient number, since it is larger than the sum of its proper divisors (2498407).

1990594373 is an equidigital number, since it uses as much as digits as its factorization.

1990594373 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2498406.

The product of its (nonzero) digits is 918540, while the sum is 50.

The square root of 1990594373 is about 44616.0775169669. The cubic root of 1990594373 is about 1257.9428877632.

The spelling of 1990594373 in words is "one billion, nine hundred ninety million, five hundred ninety-four thousand, three hundred seventy-three".