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68410387 = 388117627
BaseRepresentation
bin1000001001111…
…01110000010011
311202201121102001
410010331300103
5120003113022
610442134431
71460323123
oct404756023
9152647361
1068410387
1135685811
121aab1417
1311233126
14912ac83
156014b27
hex413dc13

68410387 has 4 divisors (see below), whose sum is σ = 68431896. Its totient is φ = 68388880.

The previous prime is 68410369. The next prime is 68410403. The reversal of 68410387 is 78301486.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 78301486 = 239150743.

It is a cyclic number.

It is not a de Polignac number, because 68410387 - 211 = 68408339 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (68410327) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4933 + ... + 12694.

It is an arithmetic number, because the mean of its divisors is an integer number (17107974).

Almost surely, 268410387 is an apocalyptic number.

68410387 is a deficient number, since it is larger than the sum of its proper divisors (21509).

68410387 is a wasteful number, since it uses less digits than its factorization.

68410387 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21508.

The product of its (nonzero) digits is 32256, while the sum is 37.

The square root of 68410387 is about 8271.0571875668. The cubic root of 68410387 is about 408.9849708432.

The spelling of 68410387 in words is "sixty-eight million, four hundred ten thousand, three hundred eighty-seven".

Divisors: 1 3881 17627 68410387