840922469 has 4 divisors (see below), whose sum is σ = 841000320. Its totient is φ = 840844620.

The previous prime is 840922451. The next prime is 840922507. The reversal of 840922469 is 964229048.

It is a happy number.

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 a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 840922469 - 2¹² = 840918373 is a prime.

It is a super-2 number, since 2×840922469² = 1414301197738111922, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (840922409) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 19487 + ... + 45404.

It is an arithmetic number, because the mean of its divisors is an integer number (210250080).

Almost surely, 2^840922469 is an apocalyptic number.

It is an amenable number.

840922469 is a deficient number, since it is larger than the sum of its proper divisors (77851).

840922469 is a wasteful number, since it uses less digits than its factorization.

840922469 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 77850.

The product of its (nonzero) digits is 248832, while the sum is 44.

The square root of 840922469 is about 28998.6632278110. The cubic root of 840922469 is about 943.8840606948.

The spelling of 840922469 in words is "eight hundred forty million, nine hundred twenty-two thousand, four hundred sixty-nine".