878846981 has 2 divisors, whose sum is σ = 878846982. Its totient is φ = 878846980.

The previous prime is 878846953. The next prime is 878846987. The reversal of 878846981 is 189648878.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 454116100 + 424730881 = 21310^2 + 20609^2 .

It is a cyclic number.

It is not a de Polignac number, because 878846981 - 2¹⁴ = 878830597 is a prime.

It is a super-2 number, since 2×878846981² = 1544744032025628722, which contains 22 as substring.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 878846981.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (878846987) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 439423490 + 439423491.

It is an arithmetic number, because the mean of its divisors is an integer number (439423491).

Almost surely, 2^878846981 is an apocalyptic number.

It is an amenable number.

878846981 is a deficient number, since it is larger than the sum of its proper divisors (1).

878846981 is an equidigital number, since it uses as much as digits as its factorization.

878846981 is an evil number, because the sum of its binary digits is even.

The product of its digits is 6193152, while the sum is 59.

The square root of 878846981 is about 29645.3534470412. The cubic root of 878846981 is about 957.8652583250.

The spelling of 878846981 in words is "eight hundred seventy-eight million, eight hundred forty-six thousand, nine hundred eighty-one".