1802939993 has 2 divisors, whose sum is σ = 1802939994. Its totient is φ = 1802939992.

The previous prime is 1802939989. The next prime is 1802940037. The reversal of 1802939993 is 3999392081.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1686580624 + 116359369 = 41068^2 + 10787^2 .

It is a cyclic number.

It is not a de Polignac number, because 1802939993 - 2² = 1802939989 is a prime.

It is not a weakly prime, because it can be changed into another prime (1802939953) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 901469996 + 901469997.

It is an arithmetic number, because the mean of its divisors is an integer number (901469997).

Almost surely, 2^1802939993 is an apocalyptic number.

It is an amenable number.

1802939993 is a deficient number, since it is larger than the sum of its proper divisors (1).

1802939993 is an equidigital number, since it uses as much as digits as its factorization.

1802939993 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 944784, while the sum is 53.

The square root of 1802939993 is about 42461.0408845568. The cubic root of 1802939993 is about 1217.1023215067.

The spelling of 1802939993 in words is "one billion, eight hundred two million, nine hundred thirty-nine thousand, nine hundred ninety-three".