878622761 has 4 divisors (see below), whose sum is σ = 880978692. Its totient is φ = 876266832.

The previous prime is 878622737. The next prime is 878622763. The reversal of 878622761 is 167226878.

878622761 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 743598361 + 135024400 = 27269^2 + 11620^2 .

It is a cyclic number.

It is not a de Polignac number, because 878622761 - 2⁶ = 878622697 is a prime.

It is a super-2 number, since 2×878622761² = 1543955912294526242, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (878622763) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1177406 + ... + 1178151.

It is an arithmetic number, because the mean of its divisors is an integer number (220244673).

Almost surely, 2^878622761 is an apocalyptic number.

It is an amenable number.

878622761 is a deficient number, since it is larger than the sum of its proper divisors (2355931).

878622761 is a wasteful number, since it uses less digits than its factorization.

878622761 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2355930.

The product of its digits is 451584, while the sum is 47.

The square root of 878622761 is about 29641.5715001752. The cubic root of 878622761 is about 957.7837914256.

The spelling of 878622761 in words is "eight hundred seventy-eight million, six hundred twenty-two thousand, seven hundred sixty-one".