865420397 has 8 divisors (see below), whose sum is σ = 895172352. Its totient is φ = 835783200.

The previous prime is 865420393. The next prime is 865420403. The reversal of 865420397 is 793024568.

865420397 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 865420397 - 2² = 865420393 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (865420393) 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, 13208 + ... + 43649.

It is an arithmetic number, because the mean of its divisors is an integer number (111896544).

Almost surely, 2^865420397 is an apocalyptic number.

It is an amenable number.

865420397 is a deficient number, since it is larger than the sum of its proper divisors (29751955).

865420397 is a wasteful number, since it uses less digits than its factorization.

865420397 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 57379.

The product of its (nonzero) digits is 362880, while the sum is 44.

The square root of 865420397 is about 29418.0284349580. The cubic root of 865420397 is about 952.9622759120.

The spelling of 865420397 in words is "eight hundred sixty-five million, four hundred twenty thousand, three hundred ninety-seven".