801990433 has 2 divisors, whose sum is σ = 801990434. Its totient is φ = 801990432.

The previous prime is 801990421. The next prime is 801990451. The reversal of 801990433 is 334099108.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 717864849 + 84125584 = 26793^2 + 9172^2 .

It is a cyclic number.

It is not a de Polignac number, because 801990433 - 2¹³ = 801982241 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 801990392 and 801990401.

It is not a weakly prime, because it can be changed into another prime (801990403) 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 as a sum of consecutive naturals, namely, 400995216 + 400995217.

It is an arithmetic number, because the mean of its divisors is an integer number (400995217).

Almost surely, 2^801990433 is an apocalyptic number.

It is an amenable number.

801990433 is a deficient number, since it is larger than the sum of its proper divisors (1).

801990433 is an equidigital number, since it uses as much as digits as its factorization.

801990433 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 23328, while the sum is 37.

The square root of 801990433 is about 28319.4356052517. The cubic root of 801990433 is about 929.0870267236.

The spelling of 801990433 in words is "eight hundred one million, nine hundred ninety thousand, four hundred thirty-three".