678601281 has 4 divisors (see below), whose sum is σ = 904801712. Its totient is φ = 452400852.

The previous prime is 678601267. The next prime is 678601307. The reversal of 678601281 is 182106876.

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 678601281 - 2⁵ = 678601249 is a prime.

It is a super-2 number, since 2×678601281² = 920999397149681922, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (678601081) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 113100211 + ... + 113100216.

It is an arithmetic number, because the mean of its divisors is an integer number (226200428).

Almost surely, 2^678601281 is an apocalyptic number.

It is an amenable number.

678601281 is a deficient number, since it is larger than the sum of its proper divisors (226200431).

678601281 is a wasteful number, since it uses less digits than its factorization.

678601281 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 226200430.

The product of its (nonzero) digits is 32256, while the sum is 39.

The square root of 678601281 is about 26049.9766026766. The cubic root of 678601281 is about 878.7625863233.

The spelling of 678601281 in words is "six hundred seventy-eight million, six hundred one thousand, two hundred eighty-one".