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68731371 = 3231246349
BaseRepresentation
bin1000001100011…
…00000111101011
311210022220201100
410012030013223
5120043400441
610453052443
71463131002
oct406140753
9153286640
1068731371
1135884995
121b027123
1311316267
1491b1c39
156079cb6
hex418c1eb

68731371 has 12 divisors (see below), whose sum is σ = 102481600. Its totient is φ = 44342640.

The previous prime is 68731349. The next prime is 68731423. The reversal of 68731371 is 17313786.

It is not a de Polignac number, because 68731371 - 25 = 68731339 is a prime.

It is a super-3 number, since 3×687313713 (a number of 24 digits) contains 333 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (68731321) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 122896 + ... + 123453.

Almost surely, 268731371 is an apocalyptic number.

68731371 is a deficient number, since it is larger than the sum of its proper divisors (33750229).

68731371 is a wasteful number, since it uses less digits than its factorization.

68731371 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 246386 (or 246383 counting only the distinct ones).

The product of its digits is 21168, while the sum is 36.

The square root of 68731371 is about 8290.4385288114. The cubic root of 68731371 is about 409.6236304161.

The spelling of 68731371 in words is "sixty-eight million, seven hundred thirty-one thousand, three hundred seventy-one".

Divisors: 1 3 9 31 93 279 246349 739047 2217141 7636819 22910457 68731371