1990280443 has 2 divisors, whose sum is σ = 1990280444. Its totient is φ = 1990280442.

The previous prime is 1990280407. The next prime is 1990280473. The reversal of 1990280443 is 3440820991.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1990280443 - 2²¹ = 1988183291 is a prime.

It is a super-2 number, since 2×1990280443² = 7922432483576552498, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 1990280396 and 1990280405.

It is not a weakly prime, because it can be changed into another prime (1990280473) 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, 995140221 + 995140222.

It is an arithmetic number, because the mean of its divisors is an integer number (995140222).

Almost surely, 2^1990280443 is an apocalyptic number.

1990280443 is a deficient number, since it is larger than the sum of its proper divisors (1).

1990280443 is an equidigital number, since it uses as much as digits as its factorization.

1990280443 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 62208, while the sum is 40.

The square root of 1990280443 is about 44612.5592518519. The cubic root of 1990280443 is about 1257.8767556273.

The spelling of 1990280443 in words is "one billion, nine hundred ninety million, two hundred eighty thousand, four hundred forty-three".