1439520073 has 4 divisors (see below), whose sum is σ = 1472997328. Its totient is φ = 1406042820.

The previous prime is 1439520041. The next prime is 1439520077. The reversal of 1439520073 is 3700259341.

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 1439520073 - 2⁵ = 1439520041 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1439520077) 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, 16738563 + ... + 16738648.

It is an arithmetic number, because the mean of its divisors is an integer number (368249332).

Almost surely, 2^1439520073 is an apocalyptic number.

It is an amenable number.

1439520073 is a deficient number, since it is larger than the sum of its proper divisors (33477255).

1439520073 is an equidigital number, since it uses as much as digits as its factorization.

1439520073 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 33477254.

The product of its (nonzero) digits is 22680, while the sum is 34.

The square root of 1439520073 is about 37941.0078015859. The cubic root of 1439520073 is about 1129.1177683292.

The spelling of 1439520073 in words is "one billion, four hundred thirty-nine million, five hundred twenty thousand, seventy-three".