1439057993 has 4 divisors (see below), whose sum is σ = 1441689360. Its totient is φ = 1436426628.

The previous prime is 1439057989. The next prime is 1439058017. The reversal of 1439057993 is 3997509341.

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 1439057993 - 2² = 1439057989 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (1439057903) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1314863 + ... + 1315956.

It is an arithmetic number, because the mean of its divisors is an integer number (360422340).

Almost surely, 2^1439057993 is an apocalyptic number.

It is an amenable number.

1439057993 is a deficient number, since it is larger than the sum of its proper divisors (2631367).

1439057993 is an equidigital number, since it uses as much as digits as its factorization.

1439057993 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2631366.

The product of its (nonzero) digits is 918540, while the sum is 50.

The square root of 1439057993 is about 37934.9178594076. The cubic root of 1439057993 is about 1128.9969413527.

The spelling of 1439057993 in words is "one billion, four hundred thirty-nine million, fifty-seven thousand, nine hundred ninety-three".