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68916437 = 421163697
BaseRepresentation
bin1000001101110…
…01010011010101
311210200022120122
410012321103111
5120120311222
610501041325
71464531362
oct406712325
9153608518
1068916437
11359a0a37
121b0b6245
131137c575
14921d469
1560b4a42
hex41b94d5

68916437 has 4 divisors (see below), whose sum is σ = 69080556. Its totient is φ = 68752320.

The previous prime is 68916433. The next prime is 68916457. The reversal of 68916437 is 73461986.

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 19439281 + 49477156 = 4409^2 + 7034^2 .

It is a cyclic number.

It is not a de Polignac number, because 68916437 - 22 = 68916433 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (68916433) 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, 81428 + ... + 82269.

It is an arithmetic number, because the mean of its divisors is an integer number (17270139).

Almost surely, 268916437 is an apocalyptic number.

It is an amenable number.

68916437 is a deficient number, since it is larger than the sum of its proper divisors (164119).

68916437 is a wasteful number, since it uses less digits than its factorization.

68916437 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 164118.

The product of its digits is 217728, while the sum is 44.

The square root of 68916437 is about 8301.5924375989. The cubic root of 68916437 is about 409.9909516147.

The spelling of 68916437 in words is "sixty-eight million, nine hundred sixteen thousand, four hundred thirty-seven".

Divisors: 1 421 163697 68916437