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68972995 = 57131737241
BaseRepresentation
bin1000001110001…
…11000111000011
311210210012011101
410013013013003
5120124113440
610502155231
71465155310
oct407070703
9153705141
1068972995
1135a2a483
121b122b17
131139c230
149235d07
1560c669a
hex41c71c3

68972995 has 64 divisors (see below), whose sum is σ = 111234816. Its totient is φ = 39813120.

The previous prime is 68972987. The next prime is 68973007. The reversal of 68972995 is 59927986.

68972995 = 4452 + 4462 + ... + 6652.

It is not a de Polignac number, because 68972995 - 23 = 68972987 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 286075 + ... + 286315.

It is an arithmetic number, because the mean of its divisors is an integer number (1738044).

Almost surely, 268972995 is an apocalyptic number.

68972995 is a gapful number since it is divisible by the number (65) formed by its first and last digit.

68972995 is a deficient number, since it is larger than the sum of its proper divisors (42261821).

68972995 is a wasteful number, since it uses less digits than its factorization.

68972995 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 320.

The product of its digits is 2449440, while the sum is 55.

The square root of 68972995 is about 8304.9981938589. The cubic root of 68972995 is about 410.1030773948.

The spelling of 68972995 in words is "sixty-eight million, nine hundred seventy-two thousand, nine hundred ninety-five".

Divisors: 1 5 7 13 17 35 37 65 85 91 119 185 221 241 259 455 481 595 629 1105 1205 1295 1547 1687 2405 3133 3145 3367 4097 4403 7735 8177 8435 8917 15665 16835 20485 21931 22015 28679 40885 44585 53261 57239 62419 109655 115921 143395 151589 266305 286195 312095 372827 579605 757945 811447 1061123 1864135 1970657 4057235 5305615 9853285 13794599 68972995