1303623 has 6 divisors (see below), whose sum is σ = 1883024. Its totient is φ = 869076.

The previous prime is 1303613. The next prime is 1303633. The reversal of 1303623 is 3263031.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (1303613) and next prime (1303633).

It is not a de Polignac number, because 1303623 - 2⁵ = 1303591 is a prime.

It is a super-2 number, since 2×1303623² = 3398865852258, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1303596 and 1303605.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1303613) 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 5 ways as a sum of consecutive naturals, for example, 72415 + ... + 72432.

2^1303623 is an apocalyptic number.

1303623 is a deficient number, since it is larger than the sum of its proper divisors (579401).

1303623 is a wasteful number, since it uses less digits than its factorization.

1303623 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 144853 (or 144850 counting only the distinct ones).

The product of its (nonzero) digits is 324, while the sum is 18.

The square root of 1303623 is about 1141.7631102816. The cubic root of 1303623 is about 109.2405818656.

Adding to 1303623 its reverse (3263031), we get a palindrome (4566654).

The spelling of 1303623 in words is "one million, three hundred three thousand, six hundred twenty-three".