842692409 has 8 divisors (see below), whose sum is σ = 911283912. Its totient is φ = 774639360.

The previous prime is 842692399. The next prime is 842692451. The reversal of 842692409 is 904296248.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 6615184 + 836077225 = 2572^2 + 28915^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 842692409 - 2¹² = 842688313 is a prime.

It is a super-3 number, since 3×842692409³ (a number of 28 digits) contains 333 as substring.

It is a Duffinian number.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 842692409.

It is not an unprimeable number, because it can be changed into a prime (842695409) 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 7 ways as a sum of consecutive naturals, for example, 131354 + ... + 137619.

It is an arithmetic number, because the mean of its divisors is an integer number (113910489).

Almost surely, 2^842692409 is an apocalyptic number.

It is an amenable number.

842692409 is a deficient number, since it is larger than the sum of its proper divisors (68591503).

842692409 is a wasteful number, since it uses less digits than its factorization.

842692409 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 269227.

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

The square root of 842692409 is about 29029.1648002487. The cubic root of 842692409 is about 944.5458131160.

The spelling of 842692409 in words is "eight hundred forty-two million, six hundred ninety-two thousand, four hundred nine".