678802053 has 4 divisors (see below), whose sum is σ = 905069408. Its totient is φ = 452534700.

The previous prime is 678802051. The next prime is 678802057. The reversal of 678802053 is 350208876.

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.

It is not a de Polignac number, because 678802053 - 2¹ = 678802051 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (678802051) 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, 113133673 + ... + 113133678.

It is an arithmetic number, because the mean of its divisors is an integer number (226267352).

Almost surely, 2^678802053 is an apocalyptic number.

It is an amenable number.

678802053 is a deficient number, since it is larger than the sum of its proper divisors (226267355).

678802053 is a wasteful number, since it uses less digits than its factorization.

678802053 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 226267354.

The product of its (nonzero) digits is 80640, while the sum is 39.

The square root of 678802053 is about 26053.8299103990. The cubic root of 678802053 is about 878.8492417865.

The spelling of 678802053 in words is "six hundred seventy-eight million, eight hundred two thousand, fifty-three".