679451545 has 4 divisors (see below), whose sum is σ = 815341860. Its totient is φ = 543561232.

The previous prime is 679451501. The next prime is 679451561. The reversal of 679451545 is 545154976.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 303595776 + 375855769 = 17424^2 + 19387^2 .

It is a cyclic number.

It is not a de Polignac number, because 679451545 - 2²⁷ = 545233817 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 679451495 and 679451504.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 67945150 + ... + 67945159.

It is an arithmetic number, because the mean of its divisors is an integer number (203835465).

Almost surely, 2^679451545 is an apocalyptic number.

It is an amenable number.

679451545 is a deficient number, since it is larger than the sum of its proper divisors (135890315).

679451545 is a wasteful number, since it uses less digits than its factorization.

679451545 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 135890314.

The product of its digits is 756000, while the sum is 46.

The square root of 679451545 is about 26066.2913549281. The cubic root of 679451545 is about 879.1294528795.

The spelling of 679451545 in words is "six hundred seventy-nine million, four hundred fifty-one thousand, five hundred forty-five".