1920419939 has 2 divisors, whose sum is σ = 1920419940. Its totient is φ = 1920419938.

The previous prime is 1920419867. The next prime is 1920419957. The reversal of 1920419939 is 9399140291.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1920419939 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1920419893 and 1920419902.

It is not a weakly prime, because it can be changed into another prime (1920419239) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 960209969 + 960209970.

It is an arithmetic number, because the mean of its divisors is an integer number (960209970).

Almost surely, 2^1920419939 is an apocalyptic number.

1920419939 is a deficient number, since it is larger than the sum of its proper divisors (1).

1920419939 is an equidigital number, since it uses as much as digits as its factorization.

1920419939 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 157464, while the sum is 47.

The square root of 1920419939 is about 43822.5962147384. The cubic root of 1920419939 is about 1242.9836102282.

The spelling of 1920419939 in words is "one billion, nine hundred twenty million, four hundred nineteen thousand, nine hundred thirty-nine".