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68157 = 327573
BaseRepresentation
bin10000101000111101
310110111100
4100220331
54140112
61243313
7402465
oct205075
9113440
1068157
1147231
1233539
132503b
141aba5
15152dc
hex10a3d

68157 has 6 divisors (see below), whose sum is σ = 98462. Its totient is φ = 45432.

The previous prime is 68147. The next prime is 68161. The reversal of 68157 is 75186.

It can be written as a sum of positive squares in only one way, i.e., 68121 + 36 = 261^2 + 6^2 .

It is not a de Polignac number, because 68157 - 24 = 68141 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 68157.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (68147) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 3778 + ... + 3795.

268157 is an apocalyptic number.

It is an amenable number.

68157 is a deficient number, since it is larger than the sum of its proper divisors (30305).

68157 is a wasteful number, since it uses less digits than its factorization.

68157 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7579 (or 7576 counting only the distinct ones).

The product of its digits is 1680, while the sum is 27.

The square root of 68157 is about 261.0689564081. The cubic root of 68157 is about 40.8479396124.

It can be divided in two parts, 68 and 157, that added together give a square (225 = 152).

The spelling of 68157 in words is "sixty-eight thousand, one hundred fifty-seven".

Divisors: 1 3 9 7573 22719 68157