1919200139 has 2 divisors, whose sum is σ = 1919200140. Its totient is φ = 1919200138.

The previous prime is 1919200079. The next prime is 1919200141. The reversal of 1919200139 is 9310029191.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1919200139 - 2¹² = 1919196043 is a prime.

Together with 1919200141, it forms a pair of twin primes.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 1919200099 and 1919200108.

It is not a weakly prime, because it can be changed into another prime (1919200039) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 959600069 + 959600070.

It is an arithmetic number, because the mean of its divisors is an integer number (959600070).

Almost surely, 2^1919200139 is an apocalyptic number.

1919200139 is a deficient number, since it is larger than the sum of its proper divisors (1).

1919200139 is an equidigital number, since it uses as much as digits as its factorization.

1919200139 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 4374, while the sum is 35.

The square root of 1919200139 is about 43808.6765264599. The cubic root of 1919200139 is about 1242.7203843741.

The spelling of 1919200139 in words is "one billion, nine hundred nineteen million, two hundred thousand, one hundred thirty-nine".