1706057993 has 4 divisors (see below), whose sum is σ = 1706908368. Its totient is φ = 1705207620.

The previous prime is 1706057989. The next prime is 1706058017. The reversal of 1706057993 is 3997506071.

It is a happy number.

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, and also an emirpimes, since its reverse is a distinct semiprime: 3997506071 = 13 ⋅307500467.

It is a cyclic number.

It is not a de Polignac number, because 1706057993 - 2² = 1706057989 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1706057923) 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, 422171 + ... + 426192.

It is an arithmetic number, because the mean of its divisors is an integer number (426727092).

Almost surely, 2^1706057993 is an apocalyptic number.

It is an amenable number.

1706057993 is a deficient number, since it is larger than the sum of its proper divisors (850375).

1706057993 is an equidigital number, since it uses as much as digits as its factorization.

1706057993 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 850374.

The product of its (nonzero) digits is 357210, while the sum is 47.

The square root of 1706057993 is about 41304.4548807995. The cubic root of 1706057993 is about 1194.8991804674.

The spelling of 1706057993 in words is "one billion, seven hundred six million, fifty-seven thousand, nine hundred ninety-three".