1990753 has 2 divisors, whose sum is σ = 1990754. Its totient is φ = 1990752.

The previous prime is 1990693. The next prime is 1990759. The reversal of 1990753 is 3570991.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1669264 + 321489 = 1292^2 + 567^2 .

It is an emirp because it is prime and its reverse (3570991) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1990753 is a prime.

It is a super-3 number, since 3×1990753³ = 23668644754112063331, which contains 333 as substring.

It is not a weakly prime, because it can be changed into another prime (1990759) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 995376 + 995377.

It is an arithmetic number, because the mean of its divisors is an integer number (995377).

2^1990753 is an apocalyptic number.

It is an amenable number.

1990753 is a deficient number, since it is larger than the sum of its proper divisors (1).

1990753 is an equidigital number, since it uses as much as digits as its factorization.

1990753 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 8505, while the sum is 34.

The square root of 1990753 is about 1410.9404664974. The cubic root of 1990753 is about 125.7976301302.

The spelling of 1990753 in words is "one million, nine hundred ninety thousand, seven hundred fifty-three".