919609107643 has 2 divisors, whose sum is σ = 919609107644. Its totient is φ = 919609107642.

The previous prime is 919609107629. The next prime is 919609107689. The reversal of 919609107643 is 346701906919.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-919609107643 is a prime.

It is a super-3 number, since 3×919609107643³ (a number of 37 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is not a weakly prime, because it can be changed into another prime (919609101643) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 459804553821 + 459804553822.

It is an arithmetic number, because the mean of its divisors is an integer number (459804553822).

Almost surely, 2^919609107643 is an apocalyptic number.

919609107643 is a deficient number, since it is larger than the sum of its proper divisors (1).

919609107643 is an equidigital number, since it uses as much as digits as its factorization.

919609107643 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2204496, while the sum is 55.

The spelling of 919609107643 in words is "nine hundred nineteen billion, six hundred nine million, one hundred seven thousand, six hundred forty-three".