869358409 has 8 divisors (see below), whose sum is σ = 878685120. Its totient is φ = 860046000.

The previous prime is 869358341. The next prime is 869358431. The reversal of 869358409 is 904853968.

It is a happy number.

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 869358409 - 2²¹ = 867261257 is a prime.

It is a super-2 number, since 2×869358409² = 1511568086598022562, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (869358449) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 155932 + ... + 161410.

It is an arithmetic number, because the mean of its divisors is an integer number (109835640).

Almost surely, 2^869358409 is an apocalyptic number.

It is an amenable number.

869358409 is a deficient number, since it is larger than the sum of its proper divisors (9326711).

869358409 is a wasteful number, since it uses less digits than its factorization.

869358409 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7151.

The product of its (nonzero) digits is 1866240, while the sum is 52.

The square root of 869358409 is about 29484.8844155781. The cubic root of 869358409 is about 954.4055432617.

The spelling of 869358409 in words is "eight hundred sixty-nine million, three hundred fifty-eight thousand, four hundred nine".