1919613401 has 2 divisors, whose sum is σ = 1919613402. Its totient is φ = 1919613400.

The previous prime is 1919613389. The next prime is 1919613407. The reversal of 1919613401 is 1043169191.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1462680025 + 456933376 = 38245^2 + 21376^2 .

It is a cyclic number.

It is not a de Polignac number, because 1919613401 - 2²² = 1915419097 is a prime.

It is not a weakly prime, because it can be changed into another prime (1919613407) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 959806700 + 959806701.

It is an arithmetic number, because the mean of its divisors is an integer number (959806701).

Almost surely, 2^1919613401 is an apocalyptic number.

It is an amenable number.

1919613401 is a deficient number, since it is larger than the sum of its proper divisors (1).

1919613401 is an equidigital number, since it uses as much as digits as its factorization.

1919613401 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 5832, while the sum is 35.

The square root of 1919613401 is about 43813.3929409718. The cubic root of 1919613401 is about 1242.8095764361.

The spelling of 1919613401 in words is "one billion, nine hundred nineteen million, six hundred thirteen thousand, four hundred one".