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68995321 = 292379149
BaseRepresentation
bin1000001110011…
…00100011111001
311210211022210021
410013030203321
5120130322241
610502450441
71465310353
oct407144371
9153738707
1068995321
1135a4522a
121b133a21
13113a9445
1492400d3
1560cd0d1
hex41cc8f9

68995321 has 4 divisors (see below), whose sum is σ = 71374500. Its totient is φ = 66616144.

The previous prime is 68995319. The next prime is 68995337. The reversal of 68995321 is 12359986.

It is a happy number.

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 30691600 + 38303721 = 5540^2 + 6189^2 .

It is a cyclic number.

It is not a de Polignac number, because 68995321 - 21 = 68995319 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (68995301) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 1189546 + ... + 1189603.

It is an arithmetic number, because the mean of its divisors is an integer number (17843625).

Almost surely, 268995321 is an apocalyptic number.

It is an amenable number.

68995321 is a deficient number, since it is larger than the sum of its proper divisors (2379179).

68995321 is a wasteful number, since it uses less digits than its factorization.

68995321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2379178.

The product of its digits is 116640, while the sum is 43.

The square root of 68995321 is about 8306.3422154400. The cubic root of 68995321 is about 410.1473216365.

The spelling of 68995321 in words is "sixty-eight million, nine hundred ninety-five thousand, three hundred twenty-one".

Divisors: 1 29 2379149 68995321