872623 has 2 divisors, whose sum is σ = 872624. Its totient is φ = 872622.

The previous prime is 872621. The next prime is 872647. The reversal of 872623 is 326278.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 872623 - 2¹ = 872621 is a prime.

It is a super-2 number, since 2×872623² = 1522941800258, which contains 22 as substring.

Together with 872621, it forms a pair of twin primes.

It is an Ulam number.

It is a junction number, because it is equal to n+sod(n) for n = 872591 and 872600.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (872621) 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 as a sum of consecutive naturals, namely, 436311 + 436312.

It is an arithmetic number, because the mean of its divisors is an integer number (436312).

2⁸⁷²⁶²³ is an apocalyptic number.

872623 is a deficient number, since it is larger than the sum of its proper divisors (1).

872623 is an equidigital number, since it uses as much as digits as its factorization.

872623 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 4032, while the sum is 28.

The square root of 872623 is about 934.1429226837. The cubic root of 872623 is about 95.5598703558.

The spelling of 872623 in words is "eight hundred seventy-two thousand, six hundred twenty-three".