919913 has 2 divisors, whose sum is σ = 919914. Its totient is φ = 919912.

The previous prime is 919903. The next prime is 919927. The reversal of 919913 is 319919.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 896809 + 23104 = 947^2 + 152^2 .

It is an emirp because it is prime and its reverse (319919) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 919913 - 2¹⁰ = 918889 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 919913.

It is not a weakly prime, because it can be changed into another prime (919903) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 459956 + 459957.

It is an arithmetic number, because the mean of its divisors is an integer number (459957).

2⁹¹⁹⁹¹³ is an apocalyptic number.

It is an amenable number.

919913 is a deficient number, since it is larger than the sum of its proper divisors (1).

919913 is an equidigital number, since it uses as much as digits as its factorization.

919913 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 2187, while the sum is 32.

The square root of 919913 is about 959.1209517053. The cubic root of 919913 is about 97.2558167561.

The spelling of 919913 in words is "nine hundred nineteen thousand, nine hundred thirteen".