678772457 has 4 divisors (see below), whose sum is σ = 740479056. Its totient is φ = 617065860.

The previous prime is 678772453. The next prime is 678772459. The reversal of 678772457 is 754277876.

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 a cyclic number.

It is not a de Polignac number, because 678772457 - 2² = 678772453 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 678772399 and 678772408.

It is not an unprimeable number, because it can be changed into a prime (678772453) 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, 30853283 + ... + 30853304.

It is an arithmetic number, because the mean of its divisors is an integer number (185119764).

Almost surely, 2^678772457 is an apocalyptic number.

It is an amenable number.

678772457 is a deficient number, since it is larger than the sum of its proper divisors (61706599).

678772457 is a wasteful number, since it uses less digits than its factorization.

678772457 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 61706598.

The product of its digits is 4609920, while the sum is 53.

The square root of 678772457 is about 26053.2619262925. The cubic root of 678772457 is about 878.8364688925.

The spelling of 678772457 in words is "six hundred seventy-eight million, seven hundred seventy-two thousand, four hundred fifty-seven".