919442609 has 4 divisors (see below), whose sum is σ = 949102080. Its totient is φ = 889783140.

The previous prime is 919442599. The next prime is 919442617. The reversal of 919442609 is 906244919.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 919442609 - 2⁸ = 919442353 is a prime.

It is a super-2 number, since 2×919442609² = 1690749422489453762, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 919442609.

It is not an unprimeable number, because it can be changed into a prime (919442659) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 14829689 + ... + 14829750.

It is an arithmetic number, because the mean of its divisors is an integer number (237275520).

Almost surely, 2^919442609 is an apocalyptic number.

It is an amenable number.

919442609 is a deficient number, since it is larger than the sum of its proper divisors (29659471).

919442609 is a wasteful number, since it uses less digits than its factorization.

919442609 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 29659470.

The product of its (nonzero) digits is 139968, while the sum is 44.

The square root of 919442609 is about 30322.3120655401. The cubic root of 919442609 is about 972.3923690534.

The spelling of 919442609 in words is "nine hundred nineteen million, four hundred forty-two thousand, six hundred nine".