865794401 has 4 divisors (see below), whose sum is σ = 869897904. Its totient is φ = 861690900.

The previous prime is 865794389. The next prime is 865794409. The reversal of 865794401 is 104497568.

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 865794401 - 2²² = 861600097 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (865794409) 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, 2051435 + ... + 2051856.

It is an arithmetic number, because the mean of its divisors is an integer number (217474476).

Almost surely, 2^865794401 is an apocalyptic number.

It is an amenable number.

865794401 is a deficient number, since it is larger than the sum of its proper divisors (4103503).

865794401 is a wasteful number, since it uses less digits than its factorization.

865794401 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4103502.

The product of its (nonzero) digits is 241920, while the sum is 44.

The square root of 865794401 is about 29424.3844625508. The cubic root of 865794401 is about 953.0995349728.

The spelling of 865794401 in words is "eight hundred sixty-five million, seven hundred ninety-four thousand, four hundred one".