1993739 has 8 divisors (see below), whose sum is σ = 2187840. Its totient is φ = 1801800.

The previous prime is 1993729. The next prime is 1993757. The reversal of 1993739 is 9373991.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 1993739 - 2⁸ = 1993483 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1993696 and 1993705.

It is not an unprimeable number, because it can be changed into a prime (1993729) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1892 + ... + 2750.

It is an arithmetic number, because the mean of its divisors is an integer number (273480).

2^1993739 is an apocalyptic number.

1993739 is a deficient number, since it is larger than the sum of its proper divisors (194101).

1993739 is a wasteful number, since it uses less digits than its factorization.

1993739 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1081.

The product of its digits is 45927, while the sum is 41.

The square root of 1993739 is about 1411.9982294606. The cubic root of 1993739 is about 125.8604947970.

The spelling of 1993739 in words is "one million, nine hundred ninety-three thousand, seven hundred thirty-nine".