1913089 has 2 divisors, whose sum is σ = 1913090. Its totient is φ = 1913088.

The previous prime is 1913081. The next prime is 1913099. The reversal of 1913089 is 9803191.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1912689 + 400 = 1383^2 + 20^2 .

It is an emirp because it is prime and its reverse (9803191) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1913089 - 2³ = 1913081 is a prime.

1913089 is a lucky number.

It is a self number, because there is not a number n which added to its sum of digits gives 1913089.

It is not a weakly prime, because it can be changed into another prime (1913081) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 956544 + 956545.

It is an arithmetic number, because the mean of its divisors is an integer number (956545).

2^1913089 is an apocalyptic number.

It is an amenable number.

1913089 is a deficient number, since it is larger than the sum of its proper divisors (1).

1913089 is an equidigital number, since it uses as much as digits as its factorization.

1913089 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1944, while the sum is 31.

The square root of 1913089 is about 1383.1446055999. The cubic root of 1913089 is about 124.1399953724.

The spelling of 1913089 in words is "one million, nine hundred thirteen thousand, eighty-nine".