1421788019 has 2 divisors, whose sum is σ = 1421788020. Its totient is φ = 1421788018.

The previous prime is 1421788003. The next prime is 1421788051. The reversal of 1421788019 is 9108871241.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1421788019 - 2⁴ = 1421788003 is a prime.

It is a super-2 number, since 2×1421788019² = 4042962341943888722, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (1421788099) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 710894009 + 710894010.

It is an arithmetic number, because the mean of its divisors is an integer number (710894010).

Almost surely, 2^1421788019 is an apocalyptic number.

1421788019 is a deficient number, since it is larger than the sum of its proper divisors (1).

1421788019 is an equidigital number, since it uses as much as digits as its factorization.

1421788019 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 32256, while the sum is 41.

The square root of 1421788019 is about 37706.6044480274. The cubic root of 1421788019 is about 1124.4624313014.

The spelling of 1421788019 in words is "one billion, four hundred twenty-one million, seven hundred eighty-eight thousand, nineteen".