1900478443 has 2 divisors, whose sum is σ = 1900478444. Its totient is φ = 1900478442.

The previous prime is 1900478413. The next prime is 1900478483. The reversal of 1900478443 is 3448740091.

It is an a-pointer prime, because the next prime (1900478483) can be obtained adding 1900478443 to its sum of digits (40).

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1900478443 is a prime.

It is a super-2 number, since 2×1900478443² = 7223636624615408498, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 1900478396 and 1900478405.

It is not a weakly prime, because it can be changed into another prime (1900478413) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 950239221 + 950239222.

It is an arithmetic number, because the mean of its divisors is an integer number (950239222).

Almost surely, 2^1900478443 is an apocalyptic number.

1900478443 is a deficient number, since it is larger than the sum of its proper divisors (1).

1900478443 is an equidigital number, since it uses as much as digits as its factorization.

1900478443 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 96768, while the sum is 40.

The square root of 1900478443 is about 43594.4772075546. The cubic root of 1900478443 is about 1238.6662825677. Note that the first 3 decimals are identical.

The spelling of 1900478443 in words is "one billion, nine hundred million, four hundred seventy-eight thousand, four hundred forty-three".