679039650 has 36 divisors (see below), whose sum is σ = 1824354402. Its totient is φ = 181077120.

The previous prime is 679039643. The next prime is 679039661. The reversal of 679039650 is 56930976.

It can be written as a sum of positive squares in 3 ways, for example, as 351900081 + 327139569 = 18759^2 + 18087^2 .

It is a super-2 number, since 2×679039650² = 922189692544245000, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 679039596 and 679039605.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 754039 + ... + 754938.

Almost surely, 2^679039650 is an apocalyptic number.

679039650 is an abundant number, since it is smaller than the sum of its proper divisors (1145314752).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

679039650 is a wasteful number, since it uses less digits than its factorization.

679039650 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1508995 (or 1508987 counting only the distinct ones).

The product of its (nonzero) digits is 306180, while the sum is 45.

The square root of 679039650 is about 26058.3892441571. The cubic root of 679039650 is about 878.9517692632.

The spelling of 679039650 in words is "six hundred seventy-nine million, thirty-nine thousand, six hundred fifty".