864509461 has 4 divisors (see below), whose sum is σ = 864614124. Its totient is φ = 864404800.

The previous prime is 864509423. The next prime is 864509467. The reversal of 864509461 is 164905468.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 729810225 + 134699236 = 27015^2 + 11606^2 .

It is a cyclic number.

It is not a de Polignac number, because 864509461 - 2⁷ = 864509333 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 (864509467) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 38770 + ... + 56851.

It is an arithmetic number, because the mean of its divisors is an integer number (216153531).

Almost surely, 2^864509461 is an apocalyptic number.

It is an amenable number.

864509461 is a deficient number, since it is larger than the sum of its proper divisors (104663).

864509461 is an equidigital number, since it uses as much as digits as its factorization.

864509461 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 104662.

The product of its (nonzero) digits is 207360, while the sum is 43.

The square root of 864509461 is about 29402.5417438697. The cubic root of 864509461 is about 952.6277978533.

The spelling of 864509461 in words is "eight hundred sixty-four million, five hundred nine thousand, four hundred sixty-one".