878551 has 2 divisors, whose sum is σ = 878552. Its totient is φ = 878550.

The previous prime is 878539. The next prime is 878567. The reversal of 878551 is 155878.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 878551 - 2⁹ = 878039 is a prime.

It is a super-3 number, since 3×878551³ = 2034333669312954453, which contains 333 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (878651) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 439275 + 439276.

It is an arithmetic number, because the mean of its divisors is an integer number (439276).

2⁸⁷⁸⁵⁵¹ is an apocalyptic number.

878551 is a deficient number, since it is larger than the sum of its proper divisors (1).

878551 is an equidigital number, since it uses as much as digits as its factorization.

878551 is an evil number, because the sum of its binary digits is even.

The product of its digits is 11200, while the sum is 34.

The square root of 878551 is about 937.3105141841. The cubic root of 878551 is about 95.7757715239.

It can be divided in two parts, 8785 and 51, that added together give a square (8836 = 94²).

The spelling of 878551 in words is "eight hundred seventy-eight thousand, five hundred fifty-one".