879553 has 2 divisors, whose sum is σ = 879554. Its totient is φ = 879552.

The previous prime is 879539. The next prime is 879581. The reversal of 879553 is 355978.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 478864 + 400689 = 692^2 + 633^2 .

It is a cyclic number.

It is not a de Polignac number, because 879553 - 2¹⁷ = 748481 is a prime.

It is a super-2 number, since 2×879553² = 1547226959618, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (879523) 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, 439776 + 439777.

It is an arithmetic number, because the mean of its divisors is an integer number (439777).

2⁸⁷⁹⁵⁵³ is an apocalyptic number.

It is an amenable number.

879553 is a deficient number, since it is larger than the sum of its proper divisors (1).

879553 is an equidigital number, since it uses as much as digits as its factorization.

879553 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 37800, while the sum is 37.

The square root of 879553 is about 937.8448699012. The cubic root of 879553 is about 95.8121689032.

Subtracting from 879553 its product of digits (37800), we obtain a triangular number (841753 = T₁₂₉₇).

The spelling of 879553 in words is "eight hundred seventy-nine thousand, five hundred fifty-three".