919842869 has 4 divisors (see below), whose sum is σ = 1003464960. Its totient is φ = 836220780.

The previous prime is 919842827. The next prime is 919842893. The reversal of 919842869 is 968248919.

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, and also an emirpimes, since its reverse is a distinct semiprime: 968248919 = 11 ⋅88022629.

It is a cyclic number.

It is not a de Polignac number, because 919842869 - 2²⁰ = 918794293 is a prime.

It is a super-2 number, since 2×919842869² = 1692221807300302322, which contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (919842809) 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, 41811029 + ... + 41811050.

It is an arithmetic number, because the mean of its divisors is an integer number (250866240).

Almost surely, 2^919842869 is an apocalyptic number.

It is an amenable number.

919842869 is a deficient number, since it is larger than the sum of its proper divisors (83622091).

919842869 is a wasteful number, since it uses less digits than its factorization.

919842869 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 83622090.

The product of its digits is 2239488, while the sum is 56.

The square root of 919842869 is about 30328.9114377684. The cubic root of 919842869 is about 972.5334521043.

The spelling of 919842869 in words is "nine hundred nineteen million, eight hundred forty-two thousand, eight hundred sixty-nine".