1378783 has 8 divisors (see below), whose sum is σ = 1602080. Its totient is φ = 1162080.

The previous prime is 1378777. The next prime is 1378799. The reversal of 1378783 is 3878731.

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

It is a cyclic number.

It is not a de Polignac number, because 1378783 - 2⁹ = 1378271 is a prime.

It is a super-2 number, since 2×1378783² = 3802085122178, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1378703) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1188 + ... + 2041.

It is an arithmetic number, because the mean of its divisors is an integer number (200260).

2^1378783 is an apocalyptic number.

1378783 is a deficient number, since it is larger than the sum of its proper divisors (223297).

1378783 is an equidigital number, since it uses as much as digits as its factorization.

1378783 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3297.

The product of its digits is 28224, while the sum is 37.

The square root of 1378783 is about 1174.2159085960. The cubic root of 1378783 is about 111.3008907427.

The spelling of 1378783 in words is "one million, three hundred seventy-eight thousand, seven hundred eighty-three".