1900889849 has 2 divisors, whose sum is σ = 1900889850. Its totient is φ = 1900889848.

The previous prime is 1900889797. The next prime is 1900889909. The reversal of 1900889849 is 9489880091.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1313700025 + 587189824 = 36245^2 + 24232^2 .

It is an emirp because it is prime and its reverse (9489880091) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1900889849 - 2¹⁶ = 1900824313 is a prime.

It is a super-2 number, since 2×1900889849² = 7226764436062485602, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 1900889794 and 1900889803.

It is not a weakly prime, because it can be changed into another prime (1900829849) 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, 950444924 + 950444925.

It is an arithmetic number, because the mean of its divisors is an integer number (950444925).

Almost surely, 2^1900889849 is an apocalyptic number.

It is an amenable number.

1900889849 is a deficient number, since it is larger than the sum of its proper divisors (1).

1900889849 is an equidigital number, since it uses as much as digits as its factorization.

1900889849 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1492992, while the sum is 56.

The square root of 1900889849 is about 43599.1955086330. The cubic root of 1900889849 is about 1238.7556561980.

The spelling of 1900889849 in words is "one billion, nine hundred million, eight hundred eighty-nine thousand, eight hundred forty-nine".