1523421019 has 2 divisors, whose sum is σ = 1523421020. Its totient is φ = 1523421018.

The previous prime is 1523420993. The next prime is 1523421041. The reversal of 1523421019 is 9101243251.

It is a strong prime.

It is an emirp because it is prime and its reverse (9101243251) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1523421019 - 2¹³ = 1523412827 is a prime.

It is a super-2 number, since 2×1523421019² = 4641623202261996722, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (1523421089) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 761710509 + 761710510.

It is an arithmetic number, because the mean of its divisors is an integer number (761710510).

Almost surely, 2^1523421019 is an apocalyptic number.

1523421019 is a deficient number, since it is larger than the sum of its proper divisors (1).

1523421019 is an equidigital number, since it uses as much as digits as its factorization.

1523421019 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2160, while the sum is 28.

The square root of 1523421019 is about 39031.0263636508. The cubic root of 1523421019 is about 1150.6413609577.

The spelling of 1523421019 in words is "one billion, five hundred twenty-three million, four hundred twenty-one thousand, nineteen".