1919013361 has 2 divisors, whose sum is σ = 1919013362. Its totient is φ = 1919013360.

The previous prime is 1919013311. The next prime is 1919013377. The reversal of 1919013361 is 1633109191.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1604483136 + 314530225 = 40056^2 + 17735^2 .

It is a cyclic number.

It is not a de Polignac number, because 1919013361 - 2¹⁷ = 1918882289 is a prime.

It is a super-2 number, since 2×1919013361² = 7365224559393032642, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (1919013311) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 959506680 + 959506681.

It is an arithmetic number, because the mean of its divisors is an integer number (959506681).

Almost surely, 2^1919013361 is an apocalyptic number.

It is an amenable number.

1919013361 is a deficient number, since it is larger than the sum of its proper divisors (1).

1919013361 is an equidigital number, since it uses as much as digits as its factorization.

1919013361 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 34.

The square root of 1919013361 is about 43806.5447279285. The cubic root of 1919013361 is about 1242.6800689056.

The spelling of 1919013361 in words is "one billion, nine hundred nineteen million, thirteen thousand, three hundred sixty-one".