1678383793 has 4 divisors (see below), whose sum is σ = 1681486708. Its totient is φ = 1675280880.

The previous prime is 1678383781. The next prime is 1678383809. The reversal of 1678383793 is 3973838761.

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 380367009 + 1298016784 = 19503^2 + 36028^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1678383793 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1678383743) 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, 1550646 + ... + 1551727.

It is an arithmetic number, because the mean of its divisors is an integer number (420371677).

Almost surely, 2^1678383793 is an apocalyptic number.

It is an amenable number.

1678383793 is a deficient number, since it is larger than the sum of its proper divisors (3102915).

1678383793 is an equidigital number, since it uses as much as digits as its factorization.

1678383793 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3102914.

The product of its digits is 4572288, while the sum is 55.

The square root of 1678383793 is about 40968.0826131758. The cubic root of 1678383793 is about 1188.4030536271.

It can be divided in two parts, 16783 and 83793, that added together give a triangular number (100576 = T₄₄₈).

The spelling of 1678383793 in words is "one billion, six hundred seventy-eight million, three hundred eighty-three thousand, seven hundred ninety-three".