919101839081 has 2 divisors, whose sum is σ = 919101839082. Its totient is φ = 919101839080.

The previous prime is 919101839077. The next prime is 919101839119. The reversal of 919101839081 is 180938101919.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 878829376681 + 40272462400 = 937459^2 + 200680^2 .

It is an emirp because it is prime and its reverse (180938101919) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 919101839081 - 2² = 919101839077 is a prime.

It is a super-2 number, since 2×919101839081² (a number of 25 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (919101139081) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 459550919540 + 459550919541.

It is an arithmetic number, because the mean of its divisors is an integer number (459550919541).

Almost surely, 2^919101839081 is an apocalyptic number.

It is an amenable number.

919101839081 is a deficient number, since it is larger than the sum of its proper divisors (1).

919101839081 is an equidigital number, since it uses as much as digits as its factorization.

919101839081 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 139968, while the sum is 50.

The spelling of 919101839081 in words is "nine hundred nineteen billion, one hundred one million, eight hundred thirty-nine thousand, eighty-one".