679312045 has 16 divisors (see below), whose sum is σ = 839385648. Its totient is φ = 527385600.

The previous prime is 679312033. The next prime is 679312069. The reversal of 679312045 is 540213976.

It can be written as a sum of positive squares in 8 ways, for example, as 56460196 + 622851849 = 7514^2 + 24957^2 .

It is not a de Polignac number, because 679312045 - 2¹¹ = 679309997 is a prime.

It is a super-2 number, since 2×679312045² = 922929708964164050, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (37).

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 679311995 and 679312013.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 69607 + ... + 78763.

It is an arithmetic number, because the mean of its divisors is an integer number (52461603).

Almost surely, 2^679312045 is an apocalyptic number.

It is an amenable number.

679312045 is a deficient number, since it is larger than the sum of its proper divisors (160073603).

679312045 is a wasteful number, since it uses less digits than its factorization.

679312045 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9600.

The product of its (nonzero) digits is 45360, while the sum is 37.

The square root of 679312045 is about 26063.6153478369. The cubic root of 679312045 is about 879.0692832944.

The spelling of 679312045 in words is "six hundred seventy-nine million, three hundred twelve thousand, forty-five".