1913964089 has 2 divisors, whose sum is σ = 1913964090. Its totient is φ = 1913964088.

The previous prime is 1913964079. The next prime is 1913964131. The reversal of 1913964089 is 9804693191.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1231448464 + 682515625 = 35092^2 + 26125^2 .

It is an emirp because it is prime and its reverse (9804693191) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1913964089 is a prime.

It is not a weakly prime, because it can be changed into another prime (1913964029) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 956982044 + 956982045.

It is an arithmetic number, because the mean of its divisors is an integer number (956982045).

Almost surely, 2^1913964089 is an apocalyptic number.

It is an amenable number.

1913964089 is a deficient number, since it is larger than the sum of its proper divisors (1).

1913964089 is an equidigital number, since it uses as much as digits as its factorization.

1913964089 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 419904, while the sum is 50.

The square root of 1913964089 is about 43748.8752884003. The cubic root of 1913964089 is about 1241.5892060882.

The spelling of 1913964089 in words is "one billion, nine hundred thirteen million, nine hundred sixty-four thousand, eighty-nine".