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79905970 = 257990597
BaseRepresentation
bin1001100001101…
…00010010110010
312120100122101101
410300310102302
5130423442340
611532355014
71660122004
oct460642262
9176318341
1079905970
11411175a1
1222915a6a
1313729651
14a880374
157035c9a
hex4c344b2

79905970 has 8 divisors (see below), whose sum is σ = 143830764. Its totient is φ = 31962384.

The previous prime is 79905953. The next prime is 79905971. The reversal of 79905970 is 7950997.

It can be written as a sum of positive squares in 2 ways, for example, as 79727041 + 178929 = 8929^2 + 423^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a self number, because there is not a number n which added to its sum of digits gives 79905970.

It is not an unprimeable number, because it can be changed into a prime (79905971) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3995289 + ... + 3995308.

Almost surely, 279905970 is an apocalyptic number.

79905970 is a deficient number, since it is larger than the sum of its proper divisors (63924794).

79905970 is a wasteful number, since it uses less digits than its factorization.

79905970 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7990604.

The product of its (nonzero) digits is 178605, while the sum is 46.

The square root of 79905970 is about 8939.0139277216. The cubic root of 79905970 is about 430.7180539101.

The spelling of 79905970 in words is "seventy-nine million, nine hundred five thousand, nine hundred seventy".

Divisors: 1 2 5 10 7990597 15981194 39952985 79905970