1819421029 has 2 divisors, whose sum is σ = 1819421030. Its totient is φ = 1819421028.

The previous prime is 1819420997. The next prime is 1819421059. The reversal of 1819421029 is 9201249181.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1213128900 + 606292129 = 34830^2 + 24623^2 .

It is a cyclic number.

It is not a de Polignac number, because 1819421029 - 2⁵ = 1819420997 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1819421059) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 909710514 + 909710515.

It is an arithmetic number, because the mean of its divisors is an integer number (909710515).

Almost surely, 2^1819421029 is an apocalyptic number.

It is an amenable number.

1819421029 is a deficient number, since it is larger than the sum of its proper divisors (1).

1819421029 is an equidigital number, since it uses as much as digits as its factorization.

1819421029 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 10368, while the sum is 37.

The square root of 1819421029 is about 42654.6718308792. The cubic root of 1819421029 is about 1220.7996703437.

The spelling of 1819421029 in words is "one billion, eight hundred nineteen million, four hundred twenty-one thousand, twenty-nine".