1997909932219 has 2 divisors, whose sum is σ = 1997909932220. Its totient is φ = 1997909932218.

The previous prime is 1997909932153. The next prime is 1997909932223. The reversal of 1997909932219 is 9122399097991.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1997909932219 - 2⁹ = 1997909931707 is a prime.

It is a super-2 number, since 2×1997909932219² (a number of 25 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (1997909932229) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 998954966109 + 998954966110.

It is an arithmetic number, because the mean of its divisors is an integer number (998954966110).

Almost surely, 2^{1997909932219} is an apocalyptic number.

1997909932219 is a deficient number, since it is larger than the sum of its proper divisors (1).

1997909932219 is an equidigital number, since it uses as much as digits as its factorization.

1997909932219 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 44641044, while the sum is 70.

The spelling of 1997909932219 in words is "one trillion, nine hundred ninety-seven billion, nine hundred nine million, nine hundred thirty-two thousand, two hundred nineteen".