1801966433 has 2 divisors, whose sum is σ = 1801966434. Its totient is φ = 1801966432.

The previous prime is 1801966409. The next prime is 1801966477. The reversal of 1801966433 is 3346691081.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1259682064 + 542284369 = 35492^2 + 23287^2 .

It is a cyclic number.

It is not a de Polignac number, because 1801966433 - 2¹⁰ = 1801965409 is a prime.

It is not a weakly prime, because it can be changed into another prime (1801962433) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 900983216 + 900983217.

It is an arithmetic number, because the mean of its divisors is an integer number (900983217).

Almost surely, 2^1801966433 is an apocalyptic number.

It is an amenable number.

1801966433 is a deficient number, since it is larger than the sum of its proper divisors (1).

1801966433 is an equidigital number, since it uses as much as digits as its factorization.

1801966433 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 93312, while the sum is 41.

The square root of 1801966433 is about 42449.5751804420. The cubic root of 1801966433 is about 1216.8832098549.

The spelling of 1801966433 in words is "one billion, eight hundred one million, nine hundred sixty-six thousand, four hundred thirty-three".