1919018741 has 2 divisors, whose sum is σ = 1919018742. Its totient is φ = 1919018740.

The previous prime is 1919018659. The next prime is 1919018747. The reversal of 1919018741 is 1478109191.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1686334225 + 232684516 = 41065^2 + 15254^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1919018741 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1919018747) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 959509370 + 959509371.

It is an arithmetic number, because the mean of its divisors is an integer number (959509371).

Almost surely, 2^1919018741 is an apocalyptic number.

It is an amenable number.

1919018741 is a deficient number, since it is larger than the sum of its proper divisors (1).

1919018741 is an equidigital number, since it uses as much as digits as its factorization.

1919018741 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 18144, while the sum is 41.

The square root of 1919018741 is about 43806.6061342351. The cubic root of 1919018741 is about 1242.6812301990.

The spelling of 1919018741 in words is "one billion, nine hundred nineteen million, eighteen thousand, seven hundred forty-one".