439972465 has 4 divisors (see below), whose sum is σ = 527966964. Its totient is φ = 351977968.

The previous prime is 439972457. The next prime is 439972469. The reversal of 439972465 is 564279934.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 564279934 = 2 ⋅282139967.

It can be written as a sum of positive squares in 2 ways, for example, as 132987024 + 306985441 = 11532^2 + 17521^2 .

It is a cyclic number.

It is not a de Polignac number, because 439972465 - 2³ = 439972457 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (439972469) 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, 43997242 + ... + 43997251.

It is an arithmetic number, because the mean of its divisors is an integer number (131991741).

Almost surely, 2^439972465 is an apocalyptic number.

It is an amenable number.

439972465 is a deficient number, since it is larger than the sum of its proper divisors (87994499).

439972465 is an equidigital number, since it uses as much as digits as its factorization.

439972465 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 87994498.

The product of its digits is 1632960, while the sum is 49.

The square root of 439972465 is about 20975.5206133245. The cubic root of 439972465 is about 760.5746260189.

The spelling of 439972465 in words is "four hundred thirty-nine million, nine hundred seventy-two thousand, four hundred sixty-five".