1290219899 has 2 divisors, whose sum is σ = 1290219900. Its totient is φ = 1290219898.

The previous prime is 1290219893. The next prime is 1290219901. The reversal of 1290219899 is 9989120921.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1290219899 - 2²⁴ = 1273442683 is a prime.

Together with 1290219901, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (1290219893) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 645109949 + 645109950.

It is an arithmetic number, because the mean of its divisors is an integer number (645109950).

Almost surely, 2^1290219899 is an apocalyptic number.

1290219899 is a deficient number, since it is larger than the sum of its proper divisors (1).

1290219899 is an equidigital number, since it uses as much as digits as its factorization.

1290219899 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 209952, while the sum is 50.

The square root of 1290219899 is about 35919.6311089076. The cubic root of 1290219899 is about 1088.6490850404.

The spelling of 1290219899 in words is "one billion, two hundred ninety million, two hundred nineteen thousand, eight hundred ninety-nine".