679123457 has 4 divisors (see below), whose sum is σ = 689259696. Its totient is φ = 668987220.

The previous prime is 679123451. The next prime is 679123573. The reversal of 679123457 is 754321976.

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 679123457 - 2⁸ = 679123201 is a prime.

It is a super-2 number, since 2×679123457² = 922417339695261698, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (679123451) 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, 5068019 + ... + 5068152.

It is an arithmetic number, because the mean of its divisors is an integer number (172314924).

Almost surely, 2^679123457 is an apocalyptic number.

679123457 is a gapful number since it is divisible by the number (67) formed by its first and last digit.

It is an amenable number.

679123457 is a deficient number, since it is larger than the sum of its proper divisors (10136239).

679123457 is a wasteful number, since it uses less digits than its factorization.

679123457 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10136238.

The product of its digits is 317520, while the sum is 44.

The square root of 679123457 is about 26059.9972563314. The cubic root of 679123457 is about 878.9879278197.

The spelling of 679123457 in words is "six hundred seventy-nine million, one hundred twenty-three thousand, four hundred fifty-seven".