1023653 has 2 divisors, whose sum is σ = 1023654. Its totient is φ = 1023652.

The previous prime is 1023643. The next prime is 1023697. The reversal of 1023653 is 3563201.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1014049 + 9604 = 1007^2 + 98^2 .

It is a cyclic number.

It is not a de Polignac number, because 1023653 - 2¹⁰ = 1022629 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1023643) 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, 511826 + 511827.

It is an arithmetic number, because the mean of its divisors is an integer number (511827).

2^1023653 is an apocalyptic number.

It is an amenable number.

1023653 is a deficient number, since it is larger than the sum of its proper divisors (1).

1023653 is an equidigital number, since it uses as much as digits as its factorization.

1023653 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 540, while the sum is 20.

The square root of 1023653 is about 1011.7573819844. The cubic root of 1023653 is about 100.7822974813.

Adding to 1023653 its reverse (3563201), we get a palindrome (4586854).

The spelling of 1023653 in words is "one million, twenty-three thousand, six hundred fifty-three".