1228783 has 2 divisors, whose sum is σ = 1228784. Its totient is φ = 1228782.

The previous prime is 1228763. The next prime is 1228789. The reversal of 1228783 is 3878221.

It is a strong prime.

It is an emirp because it is prime and its reverse (3878221) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1228783 - 2¹³ = 1220591 is a prime.

It is a super-2 number, since 2×1228783² = 3019815322178, which contains 22 as substring.

1228783 is a lucky number.

It is equal to p₉₄₉₆₃ and since 1228783 and 94963 have the same sum of digits, it is a Honaker prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1228789) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 614391 + 614392.

It is an arithmetic number, because the mean of its divisors is an integer number (614392).

2^1228783 is an apocalyptic number.

1228783 is a deficient number, since it is larger than the sum of its proper divisors (1).

1228783 is an equidigital number, since it uses as much as digits as its factorization.

1228783 is an evil number, because the sum of its binary digits is even.

The product of its digits is 5376, while the sum is 31.

The square root of 1228783 is about 1108.5048488843. The cubic root of 1228783 is about 107.1087780716.

The spelling of 1228783 in words is "one million, two hundred twenty-eight thousand, seven hundred eighty-three".