1390783 has 2 divisors, whose sum is σ = 1390784. Its totient is φ = 1390782.

The previous prime is 1390771. The next prime is 1390789. The reversal of 1390783 is 3870931.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1390783 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1390789) 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 as a sum of consecutive naturals, namely, 695391 + 695392.

It is an arithmetic number, because the mean of its divisors is an integer number (695392).

2^1390783 is an apocalyptic number.

1390783 is a deficient number, since it is larger than the sum of its proper divisors (1).

1390783 is an equidigital number, since it uses as much as digits as its factorization.

1390783 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 4536, while the sum is 31.

The square root of 1390783 is about 1179.3146314703. The cubic root of 1390783 is about 111.6228545238.

The spelling of 1390783 in words is "one million, three hundred ninety thousand, seven hundred eighty-three".