878271799 has 4 divisors (see below), whose sum is σ = 929934864. Its totient is φ = 826608736.

The previous prime is 878271787. The next prime is 878271803. The reversal of 878271799 is 997172878.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-878271799 is a prime.

It is a super-2 number, since 2×878271799² = 1542722705837392802, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (878271769) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 25831507 + ... + 25831540.

It is an arithmetic number, because the mean of its divisors is an integer number (232483716).

Almost surely, 2^878271799 is an apocalyptic number.

878271799 is a deficient number, since it is larger than the sum of its proper divisors (51663065).

878271799 is a wasteful number, since it uses less digits than its factorization.

878271799 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 51663064.

The product of its digits is 3556224, while the sum is 58.

The square root of 878271799 is about 29635.6508111430. The cubic root of 878271799 is about 957.6562469331.

The spelling of 878271799 in words is "eight hundred seventy-eight million, two hundred seventy-one thousand, seven hundred ninety-nine".