878811953 has 4 divisors (see below), whose sum is σ = 878888688. Its totient is φ = 878735220.

The previous prime is 878811937. The next prime is 878811979. The reversal of 878811953 is 359118878.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 878811953 - 2⁴ = 878811937 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (878811053) 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, 17351 + ... + 45372.

It is an arithmetic number, because the mean of its divisors is an integer number (219722172).

Almost surely, 2^878811953 is an apocalyptic number.

It is an amenable number.

878811953 is a deficient number, since it is larger than the sum of its proper divisors (76735).

878811953 is a wasteful number, since it uses less digits than its factorization.

878811953 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 76734.

The product of its digits is 483840, while the sum is 50.

The square root of 878811953 is about 29644.7626571710. The cubic root of 878811953 is about 957.8525323515.

The spelling of 878811953 in words is "eight hundred seventy-eight million, eight hundred eleven thousand, nine hundred fifty-three".